B9 RS5 High-Flow Catalytic Converter

The CTS Turbo B9 Audi RS5 High-Flow CATS are engineered to replace the restrictive factory catalytic converter located immediately after the turbocharger. Designed with advanced CAD technology, these high-flow catalytic converters ensure a perfect fit, integrating seamlessly with your factory downpipes. They are constructed from premium T304 stainless steel, featuring mandrel-bent tubing and hand TIG welding with back purging for exceptional durability and years of reliable performance. Installing these high-flow CATS provides significant power gains, enhances exhaust flow, and contributes to a more aggressive, throaty exhaust sound. The product details include T304 stainless steel construction, mandrel-bent stainless steel tubing, a fully TIG welded design, and all necessary installation hardware. It is important to note that a check engine light (CEL) may occur, and proper tuning software must be used to avoid this. The use of Stage 2 software upgrade is strongly recommended for optimal performance and to prevent CEL issues. FITMENT: This product is designed specifically for the 2018+ B9 Audi RS5 with the 2.9T engine. Stage 2 software is required to avoid a check engine light.