High Flow Cat Pipe

The CTS Turbo B6 Audi A4 1.8T High Flow Cat Pipe is engineered to seamlessly integrate into your vehicle, replacing the restrictive stock catalytic converter positioned directly after the turbocharger. This performance upgrade features robust 3-inch T304 stainless steel piping, expertly shaped with smooth mandrel bends for optimal exhaust gas flow. It includes two O2 sensor bungs, with an option to add a third for data logging purposes. The design incorporates a nearly 4-inch flare that tapers to 3 inches, ensuring efficient exhaust gas transition from the turbocharger to the high-flow cat. Constructed from T304 stainless steel and fully TIG welded, this cat pipe is built for durability and performance. It offers substantial power gains, significantly improved exhaust flow, and contributes to a more aggressive, throaty exhaust note. Install hardware is included, making it a straightforward performance upgrade for your A4. To address the Check Engine Light (CEL) that will likely occur after installation, proper tuning software is required. The use of a Stage 2 software upgrade is strongly recommended for optimal performance and to manage the CEL effectively. This product is sold for competition use and is not legal for use in highway or street vehicles.