BMW 318i / Z3 4-1 Design Stainless Steel Exhaust Header Manifold

• Product By DNA Motoring | SKU: HDS-E30-L4
• Aftermarket Exhaust Header For 1991-1996 BMW 318i / 1991-1996 BMW 318is / 1996 BMW Z3 / 1995-1996 BMW 318ti
• 4-1 High Performance JDM Racing Spec. Design
• O2 Sensor Bung Insertion and Metal Gasket Included
• Made of High Quality T-304 Stainless Steel with Computerized Mandrel-Bends
• Maximizing Smoothest High Exhaust Air Flow Rate
• Design to Reduce Air Flow Restriction To Achieve Higher Horsepower and Throttle Respond
• TIG Welded CNC Machine Flange for Resistance against Pressure and Corrosion
• Provide Aggressive Deeper Exhaust Note
• Direct Bolt-On Installation, Requires No Modification.
• Professional Installation is Highly Recommended (No Instruction Included).

The exhaust manifold found on the 1991-1996 BMW E30 4 Cylinder Engine were designed to combine the exhaust gasses from each of the cylinders quickly with a manifold that was cost effective to produce. Our 4-1 off-road racing headers are designed to allow the exhaust gasses to flow more freely from each cylinder and combine in a more efficient manner. Tubing has been optimized for the 1.8L and 1.9L engines. This creates a reduction in cylinder backpressure and improved exhaust gas velocity. These improvements free up lost horsepower and torque. An added benefit is a more performance oriented exhaust sound.