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Audi S4 Performance Axle-Back Exhausts

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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! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4660138
Mfg#:
042002LA01KT
In Stock
ON SALE! SAVE 10%
$451.99

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

$406.76 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B6 S4 Muffler Delete Kit - With 4.0" Chrome Tips

ES#4660245 - 042002LA01KT2 - B6 S4 Muffler Delete Kit - With 4.0" 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! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4660245
Mfg#:
042002LA01KT2
In Stock
ON SALE! SAVE 10%
$451.99

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

$406.76 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ValveSonic Upgrade Kit

ES#2973070 - MSAUVS02KT - ValveSonic Upgrade Kit - Upgrade your Milltek system to Valve Sonic - Milltek Sport - Audi

Upgrade your Milltek system to Valve Sonic affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
From the 2013 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2973070
Mfg#:
MSAUVS02KT
Ships in 3 Business Days
$2102.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ValveSonic Upgrade Kit

Upgrade your Milltek system to Valve Sonic affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Up to the 2012 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2973066
Mfg#:
MSAUVS01KT
Ships in 3 Business Days
$2518.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Axle-Back Exhausts

One of the most cost-effective and daily livable exhaust upgrades is an axle-back exhaust system. The axle-back exhaust replaces everything from the rear axle to the muffler for a sporty look and sound without sacrificing comfort or cost.

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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