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Audi S4 Performance Exhaust Parts

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AWE Track Edition Exhaust System - Audi B9 S4 3.0T

ES#4727526 - AWEB9S4TK - AWE Track Edition Exhaust System - Audi B9 S4 3.0T - Equipped with the same precision-engineering as its Touring Edition counterpart, minus the resonators up front and 180 Technology resonators in the rear. - AWE - Audi

Equipped with the same precision-engineering as its Touring Edition counterpart, minus the resonators up front and 180 Technology® resonators in the rear.

Brand:
AWE - Corporate Logo
ES#:
4727526
Mfg#:
AWEB9S4TK
In Stock
Starting at $2155.00 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE ProCore Performance Cast Downpipe - B9 S4/S5

ES#4708493 - IEEXCK6 - IE ProCore Performance Cast Downpipe - B9 S4/S5 - Check-Engine Light free! An emissions-friendly approach to exhaust upgrades! - Integrated Engineering - Audi

Check-Engine Light free! An emissions-friendly approach to exhaust upgrades! 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Integrated Engineering - Corporate Logo
ES#:
4708493
Mfg#:
IEEXCK6
Ships in 4 Business Days
$2874.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

HJS Tuning 2.5" High-Flow ECE Downpipes

ES#3508359 - SSXAU725 - HJS Tuning 2.5" High-Flow ECE Downpipes - Featuring HJS Tuning 200cpsi ECE-approved sports cat - Fits with OE and Milltek cat-back systems. - Milltek Sport - Audi

Featuring HJS Tuning 200cpsi ECE-approved sports cat - Fits with OE and Milltek cat-back systems.

Brand:
Milltek Sport - Corporate Logo
ES#:
3508359
Mfg#:
SSXAU725
Ships in 3 Business Days
$5244.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Valvesonic

2.37" stainless steel with quad 100mm Titanium tips From the 2013 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2827525
Mfg#:
SSXAU408
Ships in 3 Business Days
$4901.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Res-X Resonator Delete Pipe And X-Pipe

ES#4315893 - 034-105-7051 - Res-X Resonator Delete Pipe And X-Pipe - Transform your exhaust note - 034Motorsport - Audi

Transform your exhaust note

Brand:
034Motorsport - Corporate Logo
ES#:
4315893
Mfg#:
034-105-7051
In Stock
ON SALE! SAVE 10%
$443.00

This product was last offered at the strikethrough price on
06-28-2026

$398.70 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Valvesonic

ES#2827523 - SSXAU406 - Cat-Back Exhaust System - Valvesonic - 2.37" stainless steel with quad 100mm black Cerakote tips - Milltek Sport - Audi

2.37" stainless steel with quad 100mm black Cerakote tips From the 2013 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2827523
Mfg#:
SSXAU406
Ships in 3 Business Days
$4460.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Non-Resonated (Louder)

ES#3240938 - SSXAU657 - Cat-Back Exhaust System - Non-Resonated (Louder) - 2.50" stainless steel with quad GT-90 titanium tips - Milltek Sport - Audi

2.50" stainless steel with quad GT-90 titanium tips Fits models without factory rear sports differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3240938
Mfg#:
SSXAU657
Ships in 3 Business Days
$4158.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Tuning Exhaust Resonator Delete Section

ES#4848336 - 008553ECS12-01 - ECS Tuning Exhaust Resonator Delete Section - Change out your ECS Tuning B8/8.5 S4/S5 or B9 A4/S4 Valved Exhaust from resonated to non-resonated! - ECS - Audi

Change out your ECS Tuning B8/8.5 S4/S5 or B9 A4/S4 Valved Exhaust from resonated to non-resonated! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4848336
Mfg#:
008553ECS12-01
In Stock
ON SALE! SAVE 10%
$91.99

This product was last offered at the strikethrough price on
06-13-2026

$82.79 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

2.5" Performance Downpipe Set

ES#3557460 - CTSEXHDP0017 - 2.5" Performance Downpipe Set - For substantial power gains, improved exhaust flow and a more throaty sound! - CTS - Audi

For substantial power gains, improved exhaust flow and a more throaty sound!

Brand:
CTS - Corporate Logo
ES#:
3557460
Mfg#:
CTSEXHDP0017
In Stock
ON SALE! SAVE 15%
$599.99

This product was last offered at the strikethrough price on
07-10-2026

$509.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust - Non Resonated

2.50" stainless steel with your choice of tip style

Brand:
Milltek Sport - Corporate Logo
ES#:
4164626
Mfg#:
B9NONRESONATED
Ships in 3 Business Days
Starting at $3507.99 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B6 S4 Muffler Delete Kit - With 4.0" Black Chrome Tips

ES#4660138 - 042002la01KT - B6 S4 Muffler Delete Kit - With 4.0" Black Chrome Tips - Add an aggressive exhaust note to your B6 S4 so you can hear that V8 roar! - ECS - Audi

Add an aggressive exhaust note to your B6 S4 so you can hear that V8 roar! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4660138
Mfg#:
042002LA01KT
Ships in 5 Business Days
ON SALE! SAVE 10%
$463.99

This product was last offered at the strikethrough price on
06-13-2026

$417.56 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated With Exhaust Valves

ES#3240918 - SSXAU641 - Cat-Back Exhaust System - Resonated With Exhaust Valves - 2.50" stainless steel with quad GT-100 Cerakote black tips - Milltek Sport - Audi

2.50" stainless steel with quad GT-100 Cerakote black tips Fits models without factory rear sports differential
For vehicles without a sport differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3240918
Mfg#:
SSXAU641
Ships in 3 Business Days
$3752.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust - Resonated

2.50" stainless steel with your choice of tip style

Brand:
Milltek Sport - Corporate Logo
ES#:
4164540
Mfg#:
B9RESONATED
Ships in 3 Business Days
Starting at $3463.00 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated

ES#2827484 - SSXAU367 - Cat-Back Exhaust System - Resonated - 2.37" stainless steel with quad 100mm black Cerakote tips - Milltek Sport - Audi

2.37" stainless steel with quad 100mm black Cerakote tips From the 2013 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2827484
Mfg#:
SSXAU367
Ships in 3 Business Days
$3526.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B9 S4/S5 Cat-Back Exhaust System - Non-Resonated (Louder)

ES#3466846 - SSXAU701 - B9 S4/S5 Cat-Back Exhaust System - Non-Resonated (Louder) - 2.50" stainless steel with quad GT-100 cerakote black tips - Milltek Sport - Audi

2.50" stainless steel with quad GT-100 cerakote black tips Fits models with factory rear sports differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3466846
Mfg#:
SSXAU701
Ships in 3 Business Days
$3507.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Exhaust Parts

Performance exhaust systems increase flows to improve throttle response and add power. Designed to reduce back pressure, our large selection of performance exhaust parts and performance exhaust systems is made from premium materials like stainless steel. Many are TIG welded and polished to make them as attractive as they are functional.

Let us help you find the parts that fit your Audi

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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