Holley Stealth Ram Intake Manifold TPI, Polished. Shipping is not included. Features 23 degree Standard port heads. Idle-6000 RPM power band. Two-piece design features short individual runners and large upper plenum. "D"-shaped manifold ports promote high flow rates without turbulence. Good for 30-40 more horsepower than a conventional carburetor and intake system. Installation Great for Street Rods or Early Muscle Cars with ample hood clearance. Use Holley 2x58mm throttle body or stock Chevrolet LT1 throttle body (not included). Requires use of small cap distributor and Holley Fuel Rails. Not legal for sale or use in California on any pollution controlled motor vehicles.