Audi Tuning | VW Tuning

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.

Photos

Power

Price

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

A recent post made by Arin@APR shows some incredible gains to be had with the B8-chassis Audi A4 when upgrading to “APR Stage 2″ using their new RSC free-flow exhaust system.  Still in development, but available to the public VERY soon…

Originally Posted by Arin@APR

Several days back APR showed the world a teaser of the new APR Performance RSC Turboback Exhaust Systems in both Dual Exit and Single Exit Configurations.

The APR RSC Turboback Exhaust Systems were so free flowing the Engineers were able to make safe calibration changes which resulted in the following:

1. Significantly reduced turbocharger spool time over both stock software and APR stage 1 software.
On the days of testing, stage 1 torque levels at 2400 RPM’s were met and exceded at 2000 RPM’s (400 RPM’s Sooner!) simply by running APR stage 2 software with the RSC Turboback Exhaust System

2. Significantly increased and broadened the torque curve compared to both stock and APR stage 1 software.
-On the days of testing, stage 2 torque levels rose 89 FT-LBS under the curve compared to stock software. Peak torque rose from 267 ft-lbs to 355 ft-lbs, for a 88 FT-LBS peak increase.
-On the days of testing, stage 2 torque levels rose 66 FT-LBS under the curve compared to stage 1 software. Peak torque rose from 334 ft-lbs to 355 ft-lbs, for a 21 FT-LBS peak increase.

3. Significantly increased horsepower, especially the area under the curve compared to both stock and APR stage 1 software.
-On the days of testing, stage 2 torque levels rose 50 HP under the curve compared to stock software. Peak power rose from 212 hp to 248 hp, for a 36 hp peak increase.
-On the days of testing, stage 2 torque levels rose 27 HP under the curve compared to stage 1 software. Peak power rose from 235 hp to 248 hp, for a 13 hp peak increase.

All of our data was collected on back to back runs and are the results of average data. Data was also collected on the same car during several days of testing. Gains between runs were in some cases higher but we have chosen to show you an average of what you’ll expect to see as data can change between runs based on countless variables.

Now for the dyno charts of our development progress!

APR Stage 2 ECU Upgrade with APR RSC Performance Turboback Exhaust System vs Stock ECU and Stock Exhaust.

APR chose to represented at the crank with a modest 12% fixed Drivetrain loss. on a QUATTRO TIPTRONIC B8 A4. Click here to see All Wheel Tiptronic data.

APR Stage 2 ECU Upgrade with APR RSC Performance Turboback Exhaust System vs Stock ECU and Stock Exhaust. (GAINS ONLY)

APR Stage 2 ECU Upgrade with APR RSC Performance Turboback Exhaust System vs APR Stag 1 ECU Upgrade and Stock Exhaust.

APR chose to represented at the crank with a modest 12% fixed Drivetrain loss. on a QUATTRO TIPTRONIC B8 A4. Click here to see All Wheel Tiptronic data.

APR Stage 2 ECU Upgrade with APR RSC Performance Turboback Exhaust System vs APR Stag 1 ECU Upgrade and Stock Exhaust. (GAINS ONLY)

APR Stage II ECU Upgrade is a FREE Upgrade for APR Stage 1 Customers!

Exhaust availability and pricing will be released in the near future.

Nick took advantage of APR’s “Spring Into Power” Sale and picked up the RSC turbo-back exhaust for his Mk5 GTI.

It also gave us a chance to get better profile pictures of his car since his last visit when we had mounted a set of the Hartmann HRS4-252B Wheels in 19″, a great addition to our Achtuning gallery!

We hear the Zender kit is no longer available so it will be interesting to see what front lip and skirt Nick will come up with to complete the look of his GTI. When he does, we’ll let you know!

Colin left us his VW Mk5 GTI yesterday to be our second local GTI to run APR’s RSC Exhaust System.  Installation is a breeze as fitment is spot-on and the sound-increase is noticeable more outside then inside thanks to APR’s exclusive Resonance Sound Cancellation technology.

It’s a great looking GTI!  Colin meticulously carried out the plaid-pattern from his seats to the interior trim using vinyl and over-lapping each “stripe” evenly throughout.  Other noticeable mods include a Neuspeed P-Flo intake in red which was a fantastic contrast against the carbon fiber engine cover.  Then there was the OSIR carbon fiber upper hatch spoiler and black O.Z. Ultraleggeras contrasting from the white paint that really help this GTI stand-out from the typical European hot hatch found driving the streets of Seattle.  I know from my own personal experience as I spotted this car approaching me from the other direction a few days ago and it was unmistakably a modified VW.

This likely is not the last we’ll be seeing of Colin and we look forward to seeing him and his GTI again!