T304 Stainless Steel Downpipe

The CTS Turbo High-flow Cat is engineered to unleash the full potential of BMW N55 engines with electronic wastegates, maximizing exhaust flow for significant power gains. Designed using CAD technology, it ensures a perfect fit as a direct replacement for your factory downpipe. The construction utilizes robust T304 stainless steel, expertly hand TIG welded and back-purged to guarantee years of reliable performance. Key features include precise design and rigorous real-world testing, a direct replacement for the restrictive factory downpipe, and the ability to deliver substantial power increases without sacrificing performance. This high-flow cat also produces an exhilarating, sporty exhaust sound that remains subtle during cruising and eliminates the drone often associated with aftermarket exhaust systems. To avoid a check engine light (CEL) and ensure proper operation, Stage 2 software is required. The use of Bootmod3 downpipe software upgrade is strongly recommended. This product is intended for OFF-ROAD use only. Catalytic converters damaged by “crackle tune” are not covered under warranty. It does not fit RHD (Right-Hand Drive) vehicles. This high-flow cat is compatible with the following BMW models: F30 335i & 335xi (production date after 07/2013), F20/F21 M135i & M135xi (production date after 07/2013), F32/F33/F36 435i & 435xi (2013+), F22 M235i & M235xi (2013+), and F87 M2 (2015+). Please note that all CTS Turbo sales are final, and returns will not be accepted.