SPELAB Exhaust Header for 1994 - 2000 BMW E36 E46 320i/323i/328i E36/7 Z3 E39 520i/523i/528i E38 728i M52 Engine Stainless Steel Sport Exhaust Headers for BMW 323i/328i E46; Z3 E36/7; 528i E39 with M52 6-cylinder engine, and manual or automatic transmissions. Models with air pumps may require modifications. These high-performance headers were developed in Germany and are manufactured out of heavy gauge T304 stainless steel for long life. They are intended for track and off-road use only unless you weld in catalytic converters. Kit comes complete with gaskets. Left-Hand Drive models only. Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust sound. SPELAB offers many products to help you create your own custom engine headers. It's really easy and convenient to use: direct bolt-on, no modification needed. 1994-2000 Short Tube Fitment: Engine M52B20: 1994-1998 E36 320i 1995-1998 E39 520i Engine M52TUB20: 1998-2000 E46 320i, 320Ci 1998-2000 E39 520i 1999-2000 E36/7 Z3 2.0i Engine M52B25: 1995-1998 E36 323i 1995-2000 E36/5 323ti 1995-1998 E39 523i Engine M52TUB25: 1998-2000 E46 323i, 323Ci 1998-2000 E39 523i 1998-2000 E36/7 Z3 2.3i Engine M52B28: 1995-1999 E36 328i, 328is 1995-1998 E39 528i 1995-1998 E38 728i, 728iL 1997-1998 E36/7 Z3 2.8 1997-2000 Land Rover Defender (South Africa only) Engine M52TUB28: 1998-2000 E46 328i, 328Ci 1998-2000 E36/7/8 Z3 2.8 1998-2000 E39 528i 1998-2000 E38 728i 1996-2002 Long Tube Fitment: 1996-2002 BMW E46 1996-2002 BMW E39 1996-2002 BMW Z3 1996-2002 BMW 323i 1996-2002 BMW 528i 1996-2002 BMW 2.5L 1996-2002 BMW 2.8L 1996-2002 BMW 3.0L If your BMW's engine is M54. Click there Header for M54 Specifications: Brand Name: SPELABModel: EH28538Certificate: ISO9001:2000Application: Automobile Exhaust HeaderMaterial: Stainless SteelSurface: Mirror Polish Exhaust Header VS Manifold, which is the better choice? The structural differences between exhaust headers and manifolds are the material and size. From the material, exhaust headers are made of lighter, thinner steel, while exhaust manifolds are made of thick iron. Exhaust headers are also longer than exhaust manifolds. When in use, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure. Therefore, exhaust headers are a BETTER choice than an exhaust manifold. Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust sound. SPELAB offers many products to help you create your own custom engine headers. It's really easy and convenient to use: direct bolt-on, no modification needed.