APR B8 S5 4.2L FSI V8 Stage III+ TVS1740 Supercharger System

Posted on April 17, 2014 – 9:00 am

Achtuning is excited to announce APR’s release of their Audi (B8) S5 4.2L FSI V8 Stage III+ TVS1740 Supercharger System!

APR’s technical reach has grown enormously since opening in the 1990’s and currently represents a force of unmatched performance without compromise in the performance enhancement sector for Audi vehicles. Our previously available APR Stage III TVS1320 Supercharger System found its way on to several hundred S5s and RS4s around the world, making it the most popular and reliable system on the market. With more than four years’ worth of 4.2L FSI V8 supercharger engineering research, development and testing, APR’s new Stage III+ TVS1740 Supercharger System represents the pinnacle of Audi’s German engineering enhanced by APR’s American ingenuity.

In the factory form, Audi’s S5 4.2L FSI V8 leaves much to be desired compared to recent models proudly displaying the S badge. The APR Stage III+ TVS1740 Supercharger System fills the void by adding an average of roughly 45% more horsepower and torque across the entire power band. The results are nothing short of amazing; taking the S5 from 353 horsepower to 589 horsepower on pump fuel and 635 on race fuel without breaking a sweat! With up to 542 FT-LBS on tap thanks to the TVS1740’s positive displacement supercharger, expect instant acceleration with absolutely no lag commonly associated with other forms of forced induction.

Supercharger and Manifold

At the heart of the APR Stage III+ Supercharger System is Eaton’s latest Twin Vortices Series (TVS) supercharger unit, the TVS1740. The supercharger system is a positive displacement, roots style pump, utilizing Eaton’s lightweight, four-lobe 160 degree twisted rotors. Cast and assembled as a single, OEM-style-manifold and rotating group housing, the unit is quiet, compact, attractive, easy to install, and requires little to no extra maintenance to the unit itself.

The positive displacement supercharger offers power instantly as the throttle is pressed. Boost pressure builds with no perceived lag commonly associated with other types of forced induction, and provides a large increase in torque across the entire power band. Throttle control is linear and predictable and makes for an excellent driving experience both in daily driving and wide-open acceleration.

Since the supercharger does not compress air as it moves through the roots, it’s extremely efficient during light throttle and cruising situations. Unlike screw-type positive displacement superchargers that are always compressing, the TVS unit can internally bypass unwanted air, resulting in negligible parasitic loss during cruising and thus far greater fuel economy.

The single cast unit and appropriately sized rotating group eliminates potential leak points and allows for a slim, compact design without sacrificing key airflow design characteristics. The unit features a high velocity flow path through the supercharger rotors and an unrestricted discharge port into the appropriately sized plenum. The large plenum equalizes flow across all ports as air feeds evenly through the low-pressure-drop, dual-internal air-to-water heat exchangers. Finally, the ports are separated into individual runners, offering greater operation by eliminating cross talk.

Internally the dual heat exchangers offer technological advances shared by Formula 1 teams around the globe. Each unit features a louvered fin design, which minimizes pressure drop while achieving excellent cooling effectiveness. The extruded multi-rib tubing maximizes heat extraction to be carried away through the large bore coolant recirculation hard lines. Externally, supercharger coolant is pumped through a large front mounted heat exchanger where it’s cooled and circulated back through the charger again.

Engine Management

The factory Bosch MED 9 engine management system is responsible for proper operation of the engine during constantly changing environmental and load conditions. With built in compensational data for environmental variables and varying load conditions, the factory ECU is far more complex and intelligent than units found in other vehicle makes and marques.

With the significant amount of changes included in the APR Stage III+ TVS1740 Supercharger System, APR’s Engineers spent months calibrating the engine management system, including well over 100+ hours of in-house chassis dyno development. Drivability, gear changes, cruising and part throttle operation were tuned to operate smoothly as if intended by the OEM. Further development was performed putting the vehicle through performance evaluation and durability testing at the drag strip. APR’s Electrical Engineers built new coding functions, strategies and routines into the ECU to control conditions normally unseen at factory power levels. Thanks to APR’s incredible proprietary calibration suite, data logging software and full access to the coding structure of the ECU, appropriate and intelligent changes are made to ensure flawless drivability and excellent performance without compromise.

Adding forced induction to a naturally aspirated engine presents several challenges with regards to how the ECU operates. APR’s Calibration Engineers properly restructured the engine’s volumetric efficiency (VE) model to properly determine the ECU’s calculated load. Accurate open loop fueling is achieved, translating to insignificant fuel trim adjustments. Closed loop fueling is calibrated to control lambda perfectly under all operating conditions. Furthermore, compensations, such as ones related to intake air temperature, are adjusted to handle the large temperature variances compared to a factory naturally aspirated setup.

APR’s Calibration Engineers have optimized cam timing, ignition timing and lambda to provide tremendous leaps in power while retaining OEM knock control sensitivity. The result is safely achieved power, optimized for various fuel grades found around the world from low quality pump fuel, all the way to high quality, oxygenated race fuels.

Beyond power and torque enhancements, APR’s Calibration Engineers were able to increase the acceleration rate of the vehicle through other calibration changes. Ignition delays are reduced resulting in a more responsive pedal without altering overall throttle sensitivity and resolution. Drivability was greatly improved by reducing the throttle lag commonly noticed at slow speeds and while reapplying throttle after decelerating. APR’s Motorsport Rev Limiter allows power to climb all the way to the factory set redlines without dropping off several hundreds of RPM earlier. And lastly, APR’s tried and tested 4,200 RPM Motorsport Launch Limiter allows the driver to focus on launching the vehicle, rather than controlling the engine speed.

Beyond wide open throttle performance, APR’s Calibration Engineers spent countless hours optimizing vehicle drivability under daily, part-throttle, driving. The vehicle’s pedal maps are recalibrated under both standard and sport mode, providing smooth part-throttle drivability without compromising the driveshaft windup protection. The vehicle fully retains its impressive daily driver status and simply has more power on tap should the driver request more with his or her right foot! We call it Performance Without Compromise.

Front Mount Heat Exchanger

APR’s supercharger system features a large, 480mm x 335mm x 45mm, front mount heat exchanger responsible for cooling coolant as it’s pumped out of the supercharger’s dual internal air-to-water heat exchangers. This is a critical component in any supercharged application to not only keep power consistent, pull after pull, but also to help keep IAT below dangerously high levels. The heat exchanger is specific to the S5 platform, featuring a hand welded design and CNC, laser-cut brackets to provide a simple and clean method of mounting to the vehicle.

Coolant Tank

APR’s supercharger system features a 4.2L coolant tank designed to increase the cooling system’s thermal capacity. During hard sprints around the track, the supercharger’s cooling system is working overtime to cool IATs and in doing so, the supercharger’s coolant temperature rises. With increased capacity, the time it takes to raise the supercharger’s coolant increases, resulting in a lower delta T, cooler IATs, and more power. For the track enthusiast, this means longer sessions and more continuous laps, under wide-open throttle, without loss of power.

Coolant Pump and Harness

APR’s coolant pump connects to the supercharger coolant circuit and continuously circulates coolant through the supercharger’s dual internal air-to-water radiators and APR front mount heat exchanger. The pump provides adequate coolant flow through a system of this size. The pump seamlessly connects to the factory wiring harness through the included APR wiring harness with no wire splicing and is triggered by the included relay system. APR’s CNC, laser-cut bracket provides a simple and clean method of mounting the pump to the vehicle.

MAF Sensor & Housing

The factory engine management relies on load calculations derived from the mass airflow (MAF) sensor to properly control the engine. Unfortunately the factory MAF sensor becomes saturated and unable to read and correctly report the high airflow levels generated by the APR supercharger as it was designed for an engine originally creating far less power.

APR provides a new MAF sensor and precision-machined MAF sensor housing to aid in accurate airflow readings. APR’s Electrical Engineers make appropriate coding changes to the ECU to understand the new MAF setup while the calibration experts update the ECU with all of the necessary calibration data surrounding the sensor’s and housing’s properties. The end results are accurate readings and a further refined driving experience.

High Pressure Fuel Pumps

Sold separately as brand new pumps or rebuilds of the engine’s existing pumps, the APR High Pressure Fuel Pumps address fueling needs and leave plenty of headroom for safety and further increased power levels. By increasing the pump’s internal capacity, the fueling system is capable of displacing a higher volume of fuel per minute at every RPM.

Coolant Expansion Tank

The APR coolant expansion tank is used for filling the supercharger’s cooling circuit and for handling liquid expansion under various operating temperatures. The tank is cut from a single block of aircraft grade 6061 aluminum billet, is anodized black and proudly displays the APR logo. APR’s CNC, laser-cut bracket provides a simple and clean method of mounting the expansion tank to the engine bay.

Fueling Hardware

APR’s supercharger system varies greatly from the OEM intake manifold design, and for fitment’s sake, depending on vehicle year, some of the factory high pressure fueling system must be modified. The fuel rails and other high pressure and low pressure direct injection fuel lines are replaced with new, low profile, OEM parts on the pre November 2008 vehicles. All OEM safety equipment remains intact.

An APR high-pressure rail relief valve allows the system to operate at greater rail pressures, resulting in a reduction of injection on-time which translates to more ignition advance and greater power.

The kit also includes all new high-pressure fuel pump low-pressure fittings and replacement injector O-rings.

Spark Plugs

To cope with raised cylinder pressure and temperature, eight NGK Iridium IX spark plugs are included. The plugs operate at a heat range colder than stock, which results in better pre-detonation resistance under extreme conditions. With these spark plugs in, APR’s calibration engineers were able to safely achieve more power, especially in extremely demanding conditions.

Intake Air Temperature Sensor and Harness

APR’s Supercharger System significantly increases airflow through the engine, and is capable saturating the factory mass airflow sensor (MAF). As such, the sensor is unable to correctly report critical operating information to the ECU, resulting in incorrectly calculated load and poor operation. Simply adjusting the factory sensor and calibration will result in a calibration that’s only correct in a small operating window, resulting in a poor compromise.

Because the sensor is absolutely critical for safe, reliable and powerful operation and as such, APR provides a new MAF sensor capable of reading airflow levels beyond the operational range of the APR Supercharger System. APR’s Engineers account for this new sensor in the factory engine management system as simply adding the sensor alone is not permissible. The new sensor accurately reads airflow levels and provides the ECU with the correct information necessary control the engine.

The sensor’s design differs from the factory unit, and as such APR provides a precisely CNC-machined billet aluminum MAF housing to enclose the unit. The sensors placement and the MAF housing’s diameter are taken into great consideration to ensure proper airflow measurement.

The included harness allow for simple integration into the OEM wiring harness.

Coolant Lines

The APR Supercharger System features dual internal air-to-water radiators designed to reduce intake air temperature, (IAT), before entering the cylinders. With cooler IAT, the ECU will request more ignition advance and result in more power.

APR reinforced rubber coolant lines feed the Supercharger’s internal cooling system, which provides a circuit between the included APR front mount heat exchanger, APR coolant pump and APR expansion tank.

All necessary brass connectors, spring-loaded clamps and OEM style crimp clamps are included. Additionally some engine coolant lines are updated while installing the supercharger system and are included with the kit.

Fuel Lines

To accommodate the large APR Supercharger, modifications are made to the low-pressure fueling system and evap lines. Each fuel line exceeds CARB and EPA ratings and includes a patent-pending GreenShield barrier. The multi-ply, reinforced rubber hoses are designed to protect against today’s modern deteriorating fuels and include a best-in-class working psi of 225.

OEM style spring clamps and crimp clamps are included to ensure a solid connection. To help provide a neat and appealing install and assist in abrasion resistance, nylon braid hose cover and shrink-wrap is included.

Vacuum Lines

To accommodate the transition from naturally aspirated operation to forced induction, APR provides new vacuum lines and T-junctions. Leak proof connections are easily achieved thanks to the included OEM style crimp clamps.

Pulleys and Belt

The supercharger system’s internal rotors are rotated via a belt and pulley attached to the engine’s accessory drive system. The included 5pk belt and OEM idler pulleys ensure a proper connection to drive the supercharger.

N80 Harness

Several OEM components are moved during the install of the supercharger system, and as such, APR provides an OEM style extension harness to connect components without modification to the factory wiring harness.


New OEM gaskets and bolts are provided to facilitate a leak proof connection between the cylinder heads and APR Supercharger unit.

Misc. Hardware

The included core support bolts allow the vehicle’s front end to be placed into the service position. In doing so, the install process is made much easier thanks to the added space in the engine bay.

The included factory style zip-ties aid in securing various lines moved during the install and to replace factory zip-ties removed during the install process.

Padding material protects items from damage during the install process.

Install Tool

On post November 2008 vehicles, a specific tool is included to aid in installing the supercharger.

Install Manual

APR has a worldwide network consisting of many professional shops capable of performing an APR supercharger system install. To accompany APR’s world-class technical support hot line, APR includes a full, printed, step-by-step install manual to make the install process smooth and simple!

Dyno Testing

Horsepower and Torque were measured in APR’s in-house, sounmaster dyno cell, using a dynapack all wheel drive dynamometer. Multiple stock and modified runs were conducted and the SAEJ1349 corrected results were averaged together to represent the differences between a stock and APR Stage III+ B8 S5. Crank power figures were estimated based on Audi’s factory advertised results.

Click through the tabs below to view output using various fuel grades, power measured at all four wheels, estimated at the crank, and the absolute gain over stock.

All Wheel Figures | Estimated Crank Figures | Gain over Stock | 91 (R+M)/2 Octane Fuel
All Wheel Figures | Estimated Crank Figures | Gain over Stock | 93 (R+M)/2 Octane Fuel
All Wheel Figures | Estimated Crank Figures | Gain over Stock | 100 (R+M)/2 Octane Fuel

APR Stage III+ TVS1740 Supercharger System Calibration Report

348 HP & 325 FT-LBS of Torque – Stock as reported by Audi
353 HP & 325 FT-LBS of Torque – Stock as measured by APR
566 HP & 493 FT-LBS of Torque – +211 HP @ 7,100 RPM & +186 FT-LBS of Torque @ 4,950 RPM – APR 91 AKI / 95 RON
589 HP & 511 FT-LBS of Torque – +236 HP @ 7,000 RPM & +202 FT-LBS of Torque @ 4,850 RPM – APR 93 AKI / 98 RON
635 HP & 542 FT-LBS of Torque – +280 HP @ 7,150 RPM & +231 FT-LBS of Torque @ 5,350 RPM – APR 100 AKI / 104 RON

Acceleration Testing

All too often performance upgrades show improvements during a single dyno pull, but lack the ability to show the same performance in real world conditions. Furthermore the dyno may be unable to illustrate the system’s response and other tuning changes designed to make the system instantly react to the drivers input. Through acceleration testing, APR’s engineers were able to improve power delivery during launches, after gear changes and prove the cooling system was up to the task of shedding heat to keep power consistent.

APR’s local certified quarter mile drag strip is a perfect and safe testing ground for high speed, 130+ MPH sprints. Using Car and Driver magazine’s measured results as a benchmark, APR’s Engineers set out to prove the Stage III+ Supercharger System was capable of increasing the S5’s performance substantially.

Car and Driver magazine measured the B8 S5’s quarter mile performance in an underwhelming 13.4 seconds at 105 MPH. However, with the addition of the APR’s Stage III+ TVS1740 Supercharger System, the vehicle entered a league of performance often shared by exotic supercars. Using 93 octane fuel the same acceleration test was completed 2.2 seconds sooner and 19.68 MPH faster! Through testing higher octane fuelsthe gap grew even larger, ultimately resulting in an astonishing 18% reduction in time.

Many more acceleration tests were performed, including record setting quarter mile passes, proving an APR Stage III+ TVS1740 Supercharger System is the ultimate upgrade for B8 S5!

Requirements and Recommendations (Each Sold Separately)

APR High Pressure Fuel Pumps
The APR HPFPs expands the 4.2L FSI V8’s direct injection fueling capabilities to the levels required for proper operation with the APR Stage III+ TVS1740 System. Because the pumps are sold in two different forms, they are offered separately from the kit. Entirely new pumps can be purchased, or the vehicle’s existing pumps can be sent to APR for a rebuild at a discounted rate. This product is required. Product Page: APR HPFP.

The APR Supercharger System greatly increases torque over the factory output levels and as such, an upgraded clutch may be necessary to transmit power to the ground. APR highly recommends upgrading the factory clutch to one that suits the operator’s intended driving style. APR currently does not provide technical support for vehicles equipped with the Tiptronic transmission.

Induction System
The APR Supercharger System was designed using the APR Carbonio Intake System and recommends it for optimal performance. An intake port carbon cleaning is necessary to meet advertised power levels.

Exhaust System
The APR Supercharger System was designed for operation with the either the factory exhaust system or a high flow exhaust system. APR recommends the APR RSC Catback Exhaust System optimal performance.

Motul Fluids and Lubricants
Maintaining the vehicle’s fluids and lubricants is necessary. APR highly recommends Motul’s product range.

Application Guide

Pre November 2008 – B8 S5 – 4.2L FSI V8 – 6MT
Stage III+ TVS1740 Supercharger System – Includes Software
Part Number: T3100055
MSRP: $15,749.99

Post November 2008 – B8 S5 – 4.2L FSI V8 – 6MT
Stage III+ TVS1740 Supercharger System – Includes Software
Part Number: T3100060
MSRP: $14,749.99

*The APR Stage III+ TVS1740 Supercharger System physically fits Tiptronic vehicles. However, APR currently does not provide technical support for vehicles equipped with the Tiptronic transmission.

Motul Oil, Coolant and Oil Filter

During the install, oil and coolant must be drained and should be replaced to offer superior performance and protection. The APR Supercharger Systems are now complete turnkey solutions, including everything you need down to the oil, coolant and oil filter. During checkout you’ll be given the option between Motul Specific 502.00, 505.00 & 505.01 5W40 or Motul Power 300V engine oil as well as Motul Inugel Optimal Ultra Coolant and an OEM oil filter. The Premium Motul lubricant package is included at a much lower than retail price point and the costs are listed below.

Motul Specific Lubricant Install Package

10 Liters of Motul Specific 505.01, 502.00 & 505.00 SAE 5w40 Oil, Oil Filter & 2 Liters of Inugel Optimal Ultra (Concentrated) – Organic

Part Number: MO00004
MSRP: $95.00

Motul 300V Lubricant Install Package

10 Liters of Motul 300V Power 5W40, Oil Filter & 2 Liters of Inugel Optimal Ultra (Concentrated) – Organic

Part Number: MO00008
MSRP: $130.00

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APR Supercharger Upgrade Installed on Matt’s Audi S5

Posted on May 3, 2013 – 2:36 pm

Matt has taken the plunge!  With only 5000 miles on his Audi S5 he has pulled the trigger on an APR “Stage 3” Supercharger kit that should bump up power levels to a whopping 530hp/440tq!  Not only will Matt’s S5 produce blistering increases in wide open throttle acceleration, daily driving will greatly be improved with increased torque and horsepower available in even the lowest rpm’s of the power band.  Less downshifting for passing and greater rates of acceleration at all points result in a driving characteristic of pure enjoyment in all situations.  We trust Matt will enjoy his drive home!

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APR’s 3.0 TFSI Tuning.. In-House!!

Posted on June 8, 2012 – 10:48 am

Achtuning is pleased to announce in house ECU flashing of your 3.0 TFSI with a new special introductory price of $1,299!  The APR CCD makes the upgrade process as simple as plug and play. The ECU is plugged into the device, connected to the APR Direct Port Programming servers and APR Software is downloaded.   Give us a ring TODAY and schedule your installation appointment!!

Currently the following vehicles are supported:

B8 S4 3.0 TFSI
B8 S5 3.0 TFSI
C6 A6 3.0 TFSI
Q7 3.0 TFSI

The new face lifted B8 S4 & B8 S5, C7 A6, A7, possibly some Q7 and newer 3013 models may feature a new ECU type currently in development.

Achtuning’s complete catalog of 3.0 TFSI APR products can be found here:

B8 S4 3.0 TFSI

APR ECU Upgrade
APR Carbonio Stage 1 & Stage 2 Intake System
APR RSC Exhaust System
APR Supercharger Pulley Upgrade
APR Coolant Performance System
APR Badge

B8 S5 3.0 TFSI

APR ECU Upgrade
APR Carbonio Stage 1 & Stage 2 Intake System
APR Supercharger Pulley Upgrade
APR Coolant Performance System
APR Badge

C6 A6 3.0 TFSI

APR ECU Upgrade
APR Supercharger Pulley Upgrade
APR Badge

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APR’s Audi S5 Supercharger Kit

Posted on July 29, 2011 – 2:53 pm

APR’s Engineering Teams are pleased to present their second iteration of the Audi 4.2l V8 FSI
Supercharger application. Producing over 537 HP and 443 ft-lbs of torque, APR’s B8 S5 Stage III
adds over 187 horsepower which completely transforms Audi’s latest coupe to new levels of acceleration and performance.

Applying forced induction to a normally aspirated production engine is no simple task and APR’s
Engineering Teams understand that new innovations, processes and components must be incorporated into the design to insure OEM reliability and drivability while producing incredible performance results. Within APR’s Stage III, you will find more components and higher quality parts at every comparison than with any of the competing products currently available. The goal of APR’s design was not merely fitment and operation but consideration of the long term effects of such a dramatic power increase and the overall reliability of the vehicle. Extra steps must be taken to insure Performance Without Compromise.

Power Figures

Stock Advertised by Audi
354 HP | 325 LB-FT

Stock Measured by APR
350 HP | 326 LB-FT

APR 91 Octane (R+M)/2 or 95 RON – (CLICK FOR DYNO CHART)
530 HP | 437 LB-FT | +181 HP @ 6900 RPM | +138 LB-FT @ 6800 RPM

APR 93 Octane (R+M)/2 or 98 RON – (CLICK FOR DYNO CHART)
537 HP | 443 LB-FT | +187 HP @ 6900 RPM | +143 LB-FT @ 6850 RPM

APR 100 Octane (R+M)/2 or 104 RON – (CLICK FOR DYNO CHART)
556 HP | 444 LB-FT | +206 HP @ 7150 RPM | +153 LB-FT @ 6800 RPM

All Wheel Figures – (CLICK FOR DYNO CHART):
91 | 93 | 100

Acceleration Data (Click for Time Slips)

0-60 MPH – 3.8s
0-100 MPH – 8.9s
60-120 MPH – 8.7s
1/4th Mile ET – 11.9s
1/4th Mile Trap – 116.9 MPH



Application Guide

All B8 S5 4.2L FSI V8’s
All Transmissions (6MT, S-Tronic and Tiptronic)
All Markets (North America and Rest of World)


Vehicles with a build date of November 2008 and beyond have an updated fuel line system. Because of this
and several other changes two different versions are available. Please check with APR before ordering to ensure
the correct system is purchased.

Prices and Part Numbers

Pre November 2008 – T3100038 – $12,999
November 2008 and Newer – T3100039 – $13,898

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APR Presents: S5 & A5 4.2L FSI V8, 3.2L FSI V6 and 3.0 TDI Intake System!

Posted on June 2, 2011 – 9:14 am

We are proud to announce the arrival of a performance intake from our performance partners at APR – Carbonio’s latest carbon fiber intake for the 4.2L FSI V8, 3.2L FSI V6 and 3.0 TDI!!  This intake features a ram air design that completely separates the intake filter from the engine bay. Building from years of experience on and off the race track, Carbonio’s and APR’s engineering teams have spent countless hours developing a true cold air and ram air carbon fiber design that can be recreated affordably for the street performance enthusiast.

Non Collapsible Design:

During APR’s S5 4.2L FSI V8 Stage III Supercharger development, APR’s Engineering Teams quickly realized the factory intake system was not suitable for the significantly increased demands set by the APR Supercharger unit. The factory rubber intake plenum would collapse under boost and rob the engine of precious airflow. In some cases, the factory rubber intake plenum would completely detach and seal off the intake system! Thankfully APR’s Carbonio intake system does not suffer this design characteristic making this intake system suitable for even the most demanding horsepower requirements!

Smooth and Direct Air Flow:

The OEM intake system vents some of the incoming air into the engine bay and takes several twists and turns before the air ever reaches the engine. The Carbonio intake system simplifies the intake system by directing all incoming air directly at the filter. This allows for faster throttle response and increased torque at all RPM’s.

Benefits of the Carbonio CAI System include:
* Increased Horsepower and Torque
* Improved Throttle Response
* Improved Fuel Economy
* Enhanced Engine Volumetric Efficiency
* Enhanced Sound of the Engine
* Installs in an Hour (does not require bumper or headlight removal)
* Removes OEM intake snorkel which can collapse under boost (On Forced Induction Setups)
* Maintains Clean Appearance by Retaining Factory Engine Covers
* Maintains All Factory Emissions Components
* Fits Both Manual and Automatic Transmissions
* Fully Compatible and Complimentary, with APR Software, Exhaust Systems and Supercharger Systems
* Maintains the Thermostatically Controlled OEM Flap Valve Assembly from the Factory Air box

Price: $449

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APR RSC Exhaust: Audi (B8) S5 4.2L!

Posted on May 16, 2011 – 12:57 pm

APR has just added yet another application to their RSC Technology exhaust line-up: Audi (B8) S5 4.2L!!

Reflective Sound Cancellation allows for maximum exhaust gas flow while completely eliminating in cabin sound resonance (drone). RSC™ incorporates innovative technologies developed in conjunction with NASA. With limited use of packing materials and no baffles, RSC™ allows for a completely straight and free flowing exhaust path through the RSC™ mufflers. Reflective Cancellation bounces the undesirable sound waves into each other to attenuate the wave and completely eliminate the low frequency tones that create drone. Each RSC™ muffler is tuned to eliminate specific, undesirable sound frequencies allowing only the engine’s desirable exhaust notes to be heard and improving performance.

Unique Exhaust Tip Options

APR’s RSC™ Performance Exhaust for the B8 S5 introduces modular tip design that allows the end user to specify an initial tip color of either Stainless Steel or Diamond Black and other tips can be ordered separately and changed at the owner’s pleasure. Be on the lookout for special edition, limited run tip options in the future to make your S5 even more exclusive and individual to your tastes. Installation and removal of exhaust tips can be accomplished easily with only basic hand tools.

Integrated Elliptical Crossover Assembly (X-pipe)

Normally Aspirated engines and Supercharged engines still rely on proper exhaust tuning to promote the optimal flow velocity of exhaust gasses leaving the exhaust ports. APR introduces a unique and proprietary X-pipe design that was developed through multiple reiterations to perfectly match the pulse of each cylinder in the 4.2L FSI V8 to provide optimal exhaust flow. Often times, exhaust manufacturers will incorporate X-pipes into all Normally Aspirated or Supercharged applications generically without realizing that the sizing and shape of the ports in the X-pipe require specific tuning to each engine application. APR’s Engineering Team has discovered a trade secret exclusive to APR’s RSC™ Exhaust System that promotes maximum velocity of exhaust gasses by way of the X-pipe to ensure your APR RSC™ Exhaust System will compliment your future modification choices at even the highest horsepower and torque possible.

Full Catback Component Overview

The OEM exhaust system consists of Headers, Catalytic Converters, Resonated Downpipes, a Center Resonator, Rear Mufflers and Exhaust Tips. The APR RSC™ Performance Exhaust System is a Full Catback Exhaust System as it replaces the OEM Resonated Downpipes, Center Resonator, Rear Mufflers and Exhaust Tips.




With Polished Silver Tips – $2339
With Diamond Black Tips – $2469

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