Catless Headers for Max HP & Torque | Race-Proven Performance

Catless headers, also known as decat headers or test pipes, are exhaust system components designed to replace catalytic converters. By removing these restrictive emissions devices, exhaust gases flow more easily from the engine, significantly reducing backpressure. This leads to improved engine scavenging—the process of expelling exhaust gases and drawing in fresh air-fuel mixture—resulting in increased horsepower and torque, especially in higher RPM ranges. Beyond power, catless headers reduce overall exhaust system weight, contributing to better balance and handling. The elimination of catalytic converters also lowers exhaust temperatures, which can be beneficial in high-performance applications. However, it’s crucial to consider legal and environmental implications. Removing catalytic converters may violate emissions regulations in many regions, potentially causing your vehicle to fail emission tests. Additionally, catless headers can trigger the check engine light if O2 sensor simulators or custom tuning are not utilized. Our catless headers are crafted with this in mind, featuring pre-installed O2 bungs and compatibility with ECU tuning to mitigate these issues. We recommend consulting local laws and considering professional installation and tuning to optimize performance while maintaining compliance where possible.