Dorman GM Intake Manifolds are direct-fit OE replacements that are engineered with major improvements over factory intakes. Not only do these intake manifolds provide better fuel mileage and emissions control, but with Dorman's reinforced aluminum coolant crossovers, there will be less chance for failure due to corrosion and vibration. Integrated silicone intake gaskets are included to provide a better seal at the cylinder head and throttle body sealing surfaces. Dorman intakes feature thicker walls and an improved fillet design to prevent warping at the gasket during high heat and extreme conditions.