Pontiac 326 350 389 400 421 428 455 HiRise Aluminum Intake Manifold [Satin] Speedmaster high-volume water pumps have

Speedmaster high-volume water pumps have a ribbed aluminum housing and a heavy duty ball/roller bearing assembly

6" diameter ring gear

parts from other applications

This process ensures a more uniform and robust casting

being made out of high tensile aluminum alloy it eliminates case distortion and controls unwanted gear deflection

Pontiac 326 350 389 400 421 428 455 HiRise Aluminum Intake Manifold [Satin] Speedmaster high-volume water pumps haveThis 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.