Speedmaster 1-147-092 HiRise Intake Manifold Machine Polished for Pontiac

Pontiac 326 350 389 400 421 428 455 HiRise Intake Manifold Machine Polished This manifold is a single plane manifold that will fit under all Pontiac hoods including the Trans-Am "Shaker" hood. It accepts a stock Quadrajet carb but we also include an adapter plate for standard square bore carbs. This manifold is designed to work with cylinder heads up to 300 CFM. It is also available machined for injectors. Step up to the high-rpm power of an open plenum Design for racing applications or for serious street performance Cast from steel molds for a tighter grain and reduction of porosity Pressure tested to ensure maximum performance