1998-2006 BMW Exhaust Header Manifold for E46 323i 328i Z3-528I/M54 E93 E94

GSTP AUTOPARTS 1998-2006 BMW Exhaust Header Manifold for E46 323i 328i Z3-528I/M54 E93 E94 Optimizing engine performance is all about efficient air intake and exhaust flow, making exhaust headers a crucial component. These headers enhance airflow by overcoming the limitations of the stock exhaust manifold, providing each cylinder with its dedicated exhaust path. This individualization minimizes interference and back pressure, allowing cylinders to work seamlessly together, resulting in increased power to the wheels. Paired with a high-performance cold air intake and cat-back exhaust system, headers unlock your engine's full potential, delivering an exhilarating driving experience. Specifications: Outlet Size: 2" Primary Tube Size: 1.75" Number of O2 Sensor Locations: 4 Head Flange Thickness: 7/16" Outlet Flange Thickness: 3/8" Header features 6-2-1 light weight piping design. Fits both the 2.5L, 2.8L and 3.0L L6 BMW Engine Fitment: BMW E46 (323/328)    1998, 1999, 200