Pontiac 326 350 389 400 421 428 455 HiRise Aluminum Intake Manifold [Satin] The Speedmaster 9" solid pinion

The Speedmaster 9" solid pinion bearing spacer kit is designed to retain the pinion depth settings for greater strength and reliability

enhancing performance under high-stress conditions

Designed for engines producing up to 500hp

They are heat-treated and stress-relieved before any of the CNC machine work is done

Pontiac 326 350 389 400 421 428 455 HiRise Aluminum Intake Manifold [Satin] The Speedmaster 9" solid pinionThis 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.