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Audi S4 Performance Cat-Back Exhausts

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Cat-Back Exhaust

ES#2093800 - 15599 - Cat-Back Exhaust - 2.25" stainless steel with dual 3.5" polished stainless tips - Magnaflow - Audi

2.25" stainless steel with dual 3.5" polished stainless tips

Brand:
Magnaflow - Corporate Logo
ES#:
2093800
Mfg#:
15599
Ships in 1 Business Day
$1813.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated

ES#2827260 - SSXAU046 - Cat-Back Exhaust System - 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#:
2827260
Mfg#:
SSXAU046
Ships in 3 Business Days
$1776.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

2.5" Resonated Half Exhaust System

ES#3969343 - SAU044 - 2.5" Resonated Half Exhaust System - 2.5" half-exhaust built to last with 304 stainless steel and quad polished daytona tips - Scorpion - Audi

2.5" half-exhaust built to last with 304 stainless steel and quad polished daytona tips

Brand:
Scorpion - Corporate Logo
ES#:
3969343
Mfg#:
SAU044
Ships in 2 Business Days
$1741.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated

ES#4164713 - B6S4RESONATED - Cat-Back Exhaust System - Resonated - 2.25" stainless steel with your choice of tip style - Milltek Sport - Audi

2.25" stainless steel with your choice of tip style

Brand:
Milltek Sport - Corporate Logo
ES#:
4164713
Mfg#:
B6S4RESONATED
Ships on Aug 24, 2026
Starting at $1685.99 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System

ES#1892708 - 16586 - Cat-Back Exhaust System - 2.5" stainless steel with dual 4" polished stainless tips - Magnaflow - Audi

2.5" stainless steel with dual 4" polished stainless tips

Brand:
Magnaflow - Corporate Logo
ES#:
1892708
Mfg#:
16586
Back Ordered
$1646.00 USD
This product is lifetime replacement eligible Lifetime Replacement
Scratch and Dent Item

Milltek Sport Cat-Back Exhaust System - Resonated With Exhaust Valves*Scratch And Dent*

ES#4730281 - SSXAU695sd - Milltek Sport Cat-Back Exhaust System - Resonated With Exhaust Valves*Scratch And Dent* - 2.50" stainless steel with quad GT-100 Cerakote black tips - Scratch & Dent - Audi

2.50" stainless steel with quad GT-100 Cerakote black tips ALL SALES FINAL. ITEMS MAY BE DAMAGED OR MISSING COMPONENTS. PLEASE SEE IMAGES BEFORE PURCHASING. Want To Haggle? Give Us A Call Or Chat To Make An Offer On This Product!

Brand:
Scratch & Dent - Corporate Logo
ES#:
4730281
Mfg#:
SSXAU695SD
In Stock
ON SALE! SAVE 53%
$3283.00

This product was last offered at the strikethrough price on
05-02-2026

$1559.00 USD

Performance Cat-Back Exhaust System

ES#3107254 - 14902 - Performance Cat-Back Exhaust System - 3" stainless steel with dual 4.63" polished stainless tips - Borla - Audi

3" stainless steel with dual 4.63" polished stainless tips

Brand:
Borla - Corporate Logo
ES#:
3107254
Mfg#:
14902
In Stock at Vendor
$1289.99 USD
This product is lifetime replacement eligible Lifetime Replacement
Scratch and Dent Item

Cat-Back Exhaust System - Non-Resonated (Louder) *Scratch And Dent*

ES#5375603 - SSXAU701 - Cat-Back Exhaust System - Non-Resonated (Louder) *Scratch And Dent* - ***S&D NOTE: Only contains two mufflers - Sold As Is - See photos prior to ordering - ALL SALES FINAL*** - Scratch & Dent - Audi

***S&D NOTE: Only contains two mufflers - Sold As Is - See photos prior to ordering - ALL SALES FINAL*** ALL SALES FINAL. ITEMS MAY BE DAMAGED OR MISSING COMPONENTS. PLEASE SEE IMAGES BEFORE PURCHASING. Want To Haggle? Give Us A Call Or Chat To Make An Offer On This Product!

Brand:
Scratch & Dent - Corporate Logo
ES#:
5375603
Mfg#:
SSXAU701
In Stock
ON SALE! SAVE 34%
$3075.00

This product was last offered at the strikethrough price on
05-02-2026

$2044.00 USD

AWE SwitchPath Exhaust System - Audi B9 S4 3.0T

ES#4727527 - AWEB9S4SP - AWE SwitchPath Exhaust System - Audi B9 S4 3.0T - Comes complete with non-resonated downpipes, a precision-engineered x-pipe mid-section, and two valved muffler sections. - AWE - Audi

Comes complete with non-resonated downpipes, a precision-engineered x-pipe mid-section, and two valved muffler sections.

Brand:
AWE - Corporate Logo
ES#:
4727527
Mfg#:
AWEB9S4SP
Ships on Aug 11, 2026
Starting at $3625.00 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

AWE Touring Edition Exhaust System - Audi B9 S4 3.0T

ES#4727525 - AWEB9S4TR - AWE Touring Edition Exhaust System - Audi B9 S4 3.0T - Removes the factory valving and replaces it with AWEs 180 Technology drone-cancelling resonators and resonated downpipes. - AWE - Audi

Removes the factory valving and replaces it with AWE’s 180 Technology® drone-cancelling resonators and resonated downpipes.

Brand:
AWE - Corporate Logo
ES#:
4727525
Mfg#:
AWEB9S4TR
Ships on Aug 11, 2026
Starting at $2775.00 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE Catback Exhaust System - B8 S4

ES#4883642 - IEEXCG3 - IE Catback Exhaust System - B8 S4 - Features dual 2.5 tubing, 90mm quad tips, and iE's DroneTrap technology - Integrated Engineering - Audi

Features dual 2.5” tubing, 90mm quad tips, and iE's DroneTrap technology 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Integrated Engineering - Corporate Logo
ES#:
4883642
Mfg#:
IEEXCG3
Ships in 4 Business Days
$2089.99 USD
Free Shipping

Cat-Back Exhaust System - Resonated

ES#3245430 - SSXAU556 - Cat-Back Exhaust System - Resonated - 2.37" stainless steel with quad 80mm GT80 black Cerakote tips - Milltek Sport - Audi

2.37" stainless steel with quad 80mm GT80 black Cerakote tips Up to the 2012 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
3245430
Mfg#:
SSXAU556
Ships in 3 Business Days
$3481.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Valvesonic

ES#2827524 - SSXAU407 - Cat-Back Exhaust System - Valvesonic - 2.37" stainless steel with quad 100mm polished tips - Milltek Sport - Audi

2.37" stainless steel with quad 100mm polished tips *Designed for professional installation only - Setup/configuration must be completed at a Milltek Sport authorized dealer*
From the 2013 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2827524
Mfg#:
SSXAU407
Ships in 3 Business Days
$4460.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated With Exhaust Valves

ES#3236155 - SSXAU649 - Cat-Back Exhaust System - Resonated With Exhaust Valves - 2.50" stainless steel with quad Cerakote black velvet oval tips - Milltek Sport - Audi

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

Brand:
Milltek Sport - Corporate Logo
ES#:
3236155
Mfg#:
SSXAU649
Ships in 3 Business Days
$4236.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Non-Resonated Race Version

ES#3137837 - SSXAU557 - Cat-Back Exhaust System - Non-Resonated Race Version - 2.37" stainless steel with quad 80mm black Cerakote tips - Milltek Sport - Audi

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

Brand:
Milltek Sport - Corporate Logo
ES#:
3137837
Mfg#:
SSXAU557
Ships in 3 Business Days
$3147.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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