Audi B9 S4 Quattro 3.0T 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#:

5457438

Mfg#:

UVM.89MM.X2

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

Brand:

ES#:

3466846

Mfg#:

SSXAU701

$3507.99

This product was last offered at the strikethrough price on
08-17-2026

$3507.46 USD

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Lifetime Replacement

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

Brand:

ES#:

3420821

Mfg#:

SSXAU673

$3374.99

This product was last offered at the strikethrough price on
08-17-2026

$3374.78 USD

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Lifetime Replacement

Reduce turbo lag and enhance the exhaust note

Brand:

ES#:

4852347

Mfg#:

UH044-EXA

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#:

5457431

Mfg#:

UVM.63MM.X2

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

Brand:

ES#:

4164586

Mfg#:

AU94S-CDC

T304 Stainless Steel high flow front pipe kit replaces factory secondary catalytic converters

Brand:

ES#:

3644159

Mfg#:

777512

Double wall stainless steel. Single 2.25" inlet, Dual 3" outlet.

Brand:

ES#:

2974340

Mfg#:

35229

$332.00 USD

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Lifetime Replacement

2.5" Inlet - 3.5" Outlets - 1x1 Carbon Fiber Sleeves

Brand:

ES#:

5457366

Mfg#:

VTD.TIP.SD.63MM