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Audi S4 Exhaust Parts & Accessories

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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 1 Business Day
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

JHM Exhaust Headers With Cats

For Manual Transmissions - Comes with cats and 2.5" cat back

Brand:
JH Motorsports - Corporate Logo
ES#:
5376133
Mfg#:
JHM-B6S-LTHM
Ships in 10 Business Days
$3386.99 USD
Free Shipping
on orders $49 and up

2.5" High-Flow Downpipe

ES#3420821 - SSXAU673 - 2.5" High-Flow Downpipe - Featuring Milltek Sport Hi-Flow sports cat, fits with OE and Milltek cat-back systems. - Milltek Sport - Audi

Featuring Milltek Sport Hi-Flow sports cat, fits with OE and Milltek cat-back systems.

Brand:
Milltek Sport - Corporate Logo
ES#:
3420821
Mfg#:
SSXAU673
Ships in 3 Business Days
$3374.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Self-Locking Nut - Priced Each

ES#2588753 - N90369001 - Self-Locking Nut - Priced Each - Install new hardware with your new parts. M10x1.5 - Rein - Audi BMW Volkswagen

Install new hardware with your new parts. M10x1.5 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Used to secure the catalyst/downpipe to the turbo

Brand:
Rein - Corporate Logo
ES#:
2588753
Mfg#:
N90369001
In Stock
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated

ES#2827483 - SSXAU366 - Cat-Back Exhaust System - Resonated - 2.37" stainless steel with quad 100mm polished tips - Milltek Sport - Audi

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

Brand:
Milltek Sport - Corporate Logo
ES#:
2827483
Mfg#:
SSXAU366
Ships in 3 Business Days
$3272.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Non-Resonated Race Version

ES#2827492 - SSXAU375 - Cat-Back Exhaust System - Non-Resonated Race Version - 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#:
2827492
Mfg#:
SSXAU375
Ships in 3 Business Days
$3192.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

034Motorsport Res-X Resonator Delete

ES#3426667 - 034-105-7040 - 034Motorsport Res-X Resonator Delete - Unleashes a throaty growl and exotic tone that exudes the sound of performance - 034Motorsport - Audi

Unleashes a throaty growl and exotic tone that exudes the sound of performance

Brand:
034Motorsport - Corporate Logo
ES#:
3426667
Mfg#:
034-105-7040
Ships in 2 Business Days
$443.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated

ES#2827387 - SSXAU261 - Cat-Back Exhaust System - Resonated - 2.37" stainless steel with quad 80mm polished tips - Milltek Sport - Audi

2.37" stainless steel with quad 80mm polished tips Up to the 2012 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2827387
Mfg#:
SSXAU261
Ships in 3 Business Days
$3177.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Non-Resonated

ES#2827261 - SSXAU048 - Cat-Back Exhaust System - Non-Resonated - 2.25" stainless steel with quad 76.2mm polished tips - Milltek Sport - Audi

2.25" stainless steel with quad 76.2mm polished tips

Brand:
Milltek Sport - Corporate Logo
ES#:
2827261
Mfg#:
SSXAU048
Ships in 1 Business Day
$1577.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Cat-Back Exhaust System

ES#3107059 - 140403 - Performance Cat-Back Exhaust System - 2.5" stainless steel with quad 3.5" polished stainless tips - Borla - Audi

2.5" stainless steel with quad 3.5" polished stainless tips

Brand:
Borla - Corporate Logo
ES#:
3107059
Mfg#:
140403
Ships in 10 Business Days
$3130.99 USD
Free Shipping

More About Exhaust Parts & Accessories

From stock exhaust system repairs to polished stainless steel performance exhaust, we have exhaust pipes, mufflers, resonators, and catalytic converters from the most respected suppliers in the business. Go loud, stay soft, look good with exhaust parts and systems from ECS Tuning.

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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