AUDI A4 B8 3" TEST PIPE

This A4 B8 Test Pipe is a powerful, easy bolt-on alternative to a full downpipe upgrade. It replaces the most restrictive section of the OEM 2.0T exhaust — the catalytic section bolted directly to the turbo housing — freeing up airflow and cutting back-pressure for up to +24 whp and +30 wtq on tuned cars. Gains are most noticeable low in the rev range where the stock system chokes flow, and you'll get sharper throttle response and faster turbo spool too.

Highlights

• Gains of up to +24 whp / +30 wtq.
• Faster turbo spool and better throttle response.
• Improved, deeper exhaust note even with an otherwise stock system.
• 3" precise-fit design.

Construction

• 3" stainless steel for high-flow performance and longevity.
• Two O2 bungs — reinstall the factory sensors or block them off with the included bolts.
• Two CNC-machined flanges bolt directly to the OEM exhaust and turbo.
• Mounting bracket lines up with the OEM location to reduce vibration.

Run without an ECU tune or O2 sensor fix and you should expect a check-engine light; resolve it with an upgraded ECU program or an O2 sensor fix adapter.

Fitment (2.0T)

Audi B8 A4 (FWD & Quattro), B8 A5 Quattro, B8 Allroad Quattro, B8 Q5 Quattro.

What's included: ARM 3" catless test pipe, hardware & gasket kit.

Backed by ARM Motorsports' lifetime warranty against defects in craftsmanship and fitment.

Emissions disclaimer: This product is not legal for sale or use on pollution-controlled vehicles operated on public roads and is intended for off-road, race, or closed-course competition use only. You are responsible for compliance with all applicable emissions laws; use on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state laws. Please check your local laws before purchase and installation.

Ships from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email support@korespeed.com.