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Power Stop 10-12 Audi A3 Rear Autospecialty Brake Kit

$156.97 $115.60
PSBKOE5667
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PowerStop is on a mission to deliver an easy way for any driver to upgrade their brakes - no matter where or how they...
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PowerStop KOE7084 FITS:Power Stop 17-18 Audi RS3 Rear Autospecialty Brake Kit Brake Kits OE Quick View

PowerStop KOE7084 FITS:Power Stop 17-18 Audi RS3 Rear Autospecialty Brake Kit Brake Kits OE

$223.66 $160.48
PSBKOE7084
Brake Kits - OE Brakes, Rotors & Pads Commerceinstruments Best Selling Products Instock PowerStop
PowerStop is on a mission to deliver an easy way for any driver to upgrade their brakes - no matter where or how they...
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PowerStop KOE2963 FITS:Power Stop 15-18 Audi Q3 Front Autospecialty Brake Kit Brake Kits OE Quick View

PowerStop KOE2963 FITS:Power Stop 15-18 Audi Q3 Front Autospecialty Brake Kit Brake Kits OE

$244.91 $174.37
PSBKOE2963
Brake Kits - OE Brakes, Rotors & Pads Commerceinstruments Best Selling Products Instock PowerStop
PowerStop is on a mission to deliver an easy way for any driver to upgrade their brakes - no matter where or how they...

Performance Downpipes for Turbocharged BMW & Audi

The downpipe is the first exhaust section after the turbocharger — and it's the single biggest restriction in most turbo BMW and Audi exhaust systems. A larger-diameter, mandrel-bent downpipe with a high-flow catalytic converter reduces turbo backpressure, improves spool time, and unlocks the power gains your tune is asking for.

Catted vs Catless

  • High-flow catted downpipe: Replaces the factory cat with a larger substrate (200–300 cpsi vs factory 600 cpsi). Reduces restriction while maintaining some emissions compliance. Requires ECU tune to prevent CEL. Not 50-state legal in the US.
  • Catless downpipe: Maximum flow, maximum power. Smells under hard acceleration. Emissions-illegal for street use in most jurisdictions. For track/race cars only.

Power Gains

On BMW N54/N55/B58 and Audi EA888 2.0T/3.0T, a downpipe combined with a tune typically nets 25–50 hp at the wheels — the most of any single bolt-on modification on these platforms.

Key Brands

AWE Tuning · Wagner Tuning · Turbosmart · Eventuri · ECS Tuning · Forge Motorsport. All listed with inlet/outlet diameter, cat specification, and O2 sensor bung locations for your chassis.

Note on Tune Requirement

A downpipe without an ECU tune will trigger a P0420 or P0430 catalyst efficiency code within a few drive cycles. Plan to tune when installing a downpipe. Popular tunes: MHD (BMW), COBB Accessport (Audi/VW), APR, Unitronic.

Related

Cat-back exhaust systems · Intake systems · Turbocharger parts

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