Audi - S Series - S4 - B9 S4 (2018-present)

Milltek SSXAU642 Catback Quad Tip Valved Street Exhaust Audi B9 S4 Non-Sport Diff

Milltek Sport

Milltek SSXAU696 Cat-back Quad Tip Valved Street Exhaust Audi B9 S4 and S5 Sport Diff

$3,663.00

Milltek Sport

Milltek SSXAU697 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Sport Diff Models Only and Without Brace Bars)

$4,063.00

Milltek Sport

Milltek SSXAU698 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Sport Diff Models Only and Without Brace Bars)

$3,463.00

Milltek Sport

Milltek SSXAU699 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Sport Diff Models Only and Without Brace Bars)

$3,703.00

Milltek Sport

Milltek SSXAU700 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Sport Diff Models Only and Without Brace Bars)

$3,075.00

Milltek SSXAU651 Catback Quad Tip Valved Race Exhaust Audi B9 S4 and S5 Non-Sport Diff

Milltek Sport

Milltek SSXAU701 Cat-back Quad Tip Valved Race Exhaust Audi B9 S4 and S5 Sport Diff

$3,075.00

Milltek SSXAU652 Catback Quad Tip Valved Race Exhaust Audi B9 S4 Non-Sport Diff

Milltek Sport

Milltek SSXAU702 Cat-back Quad Tip Valved Race Exhaust Audi B9 S4 and S5 Sport Diff

$3,455.00

Milltek Sport

Milltek SSXAU703 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Sport Diff Models Only and Without Brace Bars)

$3,855.00

Milltek Sport

Milltek SSXAU704 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Sport Diff Models Only and Without Brace Bars)

$3,255.00

Milltek Sport

Milltek SSXAU705 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Sport Diff Models Only and Without Brace Bars)

$3,495.00

Milltek Sport

Milltek SSXAU721 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Sport Diff Models Only and Without Brace Bars)

$3,583.00

Milltek Sport

Milltek SSXAU722 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Sport Diff Models Only and Without Brace Bars)

$3,375.00

Milltek Sport

Milltek SSXAU723 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Non Sport Diff Models)

$3,583.00

Milltek Sport

Milltek SSXAU724 Cat-back Exhaust Audi B9 S4 and S5 Sportback (Non Sport Diff Models)

$3,375.00

SPC Performance

SPC 81383 Adjustable Upper Control Arm Pair Audi B9

$842.11 $779.89

Unitronic

Unitronic Stage 1 ECU Software Flash Tuning Audi B9 3.0T

$850.00

View Product

Unitronic

Unitronic UH005-AC6 P3 V3 OB2 Gauge for B9 A4/A5/S4/S5/RS5

$389.99

Unitronic

Unitronic UH006-AC6 Dragy GPS Performance Meter

$149.99

Subscribe to the Achtuning newsletter! E-mails are not shared with 3rd parties

Account

Log in

New Customer

Forgot Password

Forgot Password