2002-2016 GMC Sierra Stainless Steel Racing Exhaust Header Manifold

• Product By DNA Motoring | SKU: HDS-GY99
• Aftermarket Exhaust Header For 2002 to 2011 Chevy GMC 1500 2500 3500 V8 Engine
• Shorty 4-1 Performance Header
• 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 manifolds found in the 2002-2011 Chevrolet / GMC Pickups and SUVs 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 Shorty Style off-road headers are designed to allow the exhaust gasses to flow more freely from each 4 cylinder bank and combine in a more efficient manner. Tubing has been optimized for the 4.8L and 5.3L 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.