Audi Most Popular Parts

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

This valved cat back system features wireless remote control and quad carbon tips - This system will increase power, reduce weight, and provide a legendary exhaust note! *Must be used with quad tip rear diffuser from Audi S7 - 4K8807521DRU6*

Brand:

ES#:

4164516

Mfg#:

AUC8T-QC11

This valved cat back system features wireless remote control and quad blue coated tips - This system will increase power, reduce weight, and provide a legendary exhaust note! *Must be used with quad tip rear diffuser from Audi S7 - 4K8807521DRU6*

Brand:

ES#:

4164508

Mfg#:

AUC8T-QS11B

Gains up to +10 horsepower with an additional +10 ft lbs of torque with a legendary exhaust note!

Brand:

ES#:

3675785

Mfg#:

AUVS4-QS11C

Gains up to +12 horsepower with an additional +20 ft lbs of torque with a legendary exhaust note!

Brand:

ES#:

3675690

Mfg#:

AU8SS-QC11

This valved cat back system features wireless remote control and quad gold tips - This system will increase power, reduce weight, and provide a legendary exhaust note! *Must be used with quad tip rear diffuser from Audi S7 - 4K8807521DRU6*

Brand:

ES#:

4164513

Mfg#:

AUC8T-QS11G

This system will increase power, reduce weight, and provide a legendary exhaust note! Requires a S4 Style Quad diffuser on non-S-line rear bumper or an S4 rear diffuser on S-line rear bumper.

Brand:

ES#:

3675676

Mfg#:

A5942-QS11M

Gains up to +10 horsepower with an additional +13 ft lbs of torque with a legendary exhaust note!

Brand:

ES#:

3675696

Mfg#:

AU8ST-DS33M

Gains up to +11 horsepower with an additional +19 ft lbs of torque with a legendary exhaust note! Will require use of the TTS Quad Exit rear diffuser

Brand:

ES#:

3675687

Mfg#:

AU8JT-QS11B

Gains up to +11 horsepower with an additional +19 ft lbs of torque with a legendary exhaust note! Will require use of the TTS Quad Exit rear diffuser

Brand:

ES#:

3675685

Mfg#:

AU8JS-QS11M

Gains up to +11 horsepower with an additional +19 ft lbs of torque with a legendary exhaust note! Will require use of the TTS Quad Exit rear diffuser

Brand:

ES#:

3675682

Mfg#:

AU8JS-QC11

Gains of up to +14.2 horsepower with an additional +22 Nm of torque with a legendary exhaust note!

Brand:

ES#:

4159039

Mfg#:

AUBS2-QC11

This valved cat back system features wireless remote control and quad chrome silver tips - This system will increase power, reduce weight, and provide a legendary exhaust note! *Must be used with quad tip rear diffuser from Audi S7 - 4K8807521DRU6*

Brand:

ES#:

4164510

Mfg#:

AUC8T-QS11C

Gains up to +11 horsepower with an additional +19 ft lbs of torque with a legendary exhaust note! Will require use of the TTS Quad Exit rear diffuser

Brand:

ES#:

3675683

Mfg#:

AU8JS-QS11B

Gains up to +11 horsepower with an additional +19 ft lbs of torque with a legendary exhaust note! Will require use of the TTS Quad Exit rear diffuser

Brand:

ES#:

3675686

Mfg#:

AU8JT-QC11

Fits the front right position

Brand:

ES#:

5425389

Mfg#:

RH-5294

15% off MSRP

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

$74.00

This product was last offered at the strikethrough price on
11-10-2026

$62.99 USD

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