Audi S4 Performance Exhaust Parts & Upgrades

Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button

Brand:

ES#:

5457435

Mfg#:

UVM.76MM.X1

Gains of up to +17 horsepower with an additional +24 ft lbs of torque with a legendary exhaust note!

Brand:

ES#:

4135747

Mfg#:

AUBS4-QS11G

Gains of up to +17 horsepower with an additional +24 ft lbs of torque with a legendary exhaust note!

Brand:

ES#:

4135744

Mfg#:

AUBS4-QS11M

Sport Cat-Pipe with 200 CPSI Catalytic Converter - Increase power, reduce weight, and improve sound!

Brand:

ES#:

4164584

Mfg#:

AU94S-CD

Gains of up to +17 horsepower with an additional +24 ft lbs of torque with a legendary exhaust note!

Brand:

ES#:

4135739

Mfg#:

AUBS4-QS11B

Double wall stainless steel. Single 2.25" inlet, Dual 3" outlet - Left and right Not vehicle specific. You MUST measure prior to purchasing!

Brand:

ES#:

5481937

Mfg#:

35227KT

$332.00 USD

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on orders $49 and up

Lifetime Replacement

Upgrade your Milltek system to Valve Sonic

Brand:

ES#:

2973066

Mfg#:

MSAUVS01KT

$2518.99 USD

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Lifetime Replacement

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

Brand:

ES#:

3969344

Mfg#:

SAU044C

Stainless steel non-resonated cat-back exhaust system with quad round, polished tips - Includes downpipes with high flow secondary cats

Brand:

ES#:

4017779

Mfg#:

777532KT

3.0" Inlet - 3.5" Outlet - Forged Carbon Sleeve

Brand:

ES#:

4708458

Mfg#:

VTTPSLVE3035FC

Mufflered midpipe that connects the downpipe to the rear mufflers

Brand:

ES#:

3250337

Mfg#:

8W0253409G

6% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$1172.99

This product was last offered at the strikethrough price on
08-31-2026

$1105.99 USD

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Free Shipping

on orders $49 and up

Lifetime Replacement

2.5" stainless steel with dual 3.5" polished stainless tips Avant models only

Brand:

ES#:

2613791

Mfg#:

16769

$1196.00 USD

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Lifetime Replacement

Stainless steel system with high flow catalytic converter

Brand:

ES#:

3107643

Mfg#:

769101KT

Stainless steel non-resonated cat-back exhaust system with quad round, polished tips - Includes secondary cat delete downpipes

Brand:

ES#:

4017775

Mfg#:

777512KT

Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button

Brand:

ES#:

5457434

Mfg#:

UVM76MMTSTYLEX1