CTS Turbo B5 Audi A4 1.8T Test Pipe

The premier test pipe for the B5 Audi A4 1.8T. It drops straight into place of the restrictive stock catalytic converter sitting just after the turbo, with smooth mandrel-bent 3" stainless tubing and seamless transitions from turbo to exhaust. Expect substantial power gains, improved flow, and a throatier note. Each pipe is hand-TIG-welded and includes two O2 sensor bungs, with room for an optional third.

Product details

• T304 stainless steel construction
• 3" mandrel-bent tubing
• Fully TIG-welded design
• Two O2 sensor bungs (optional third available)
• Install hardware included

Fitment

To clear the CEL that results, proper tuning software is required, and a Stage 2 software upgrade is strongly recommended. For the sake of the environment, CTS Turbo recommends choosing a high-flow cat.

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.