KSP Performance exhaust header MT-60H3309 fits 2000-2006 BMW E46 320i, 325i, 330i, as well as BMW Z3 and Z4 models equipped with M54 2.2L, 2.5L, and 3.0L engines. Crafted from high-quality stainless steel with CNC-machined flanges, mandrel-bent primary tubes, and TIG-welded construction, this header is engineered for durability, smooth exhaust flow, and precise fitment. The polished surface finish enhances appearance while improving resistance to corrosion. Designed as a direct bolt-on replacement, it provides increased horsepower, torque, and throttle response, making it a reliable upgrade for BMW owners seeking improved performance across the RPM range