Pontiac 326 350 389 400 421 428 455 HiRise Aluminum Intake Manifold [Polished] The Speedmaster throttle body begins

The Speedmaster throttle body begins as a billet of 6061- T6 aluminum for superior quality and is introduced to a state-of-the-art CNC machine

Billet aluminum pump body and stator back

They can be used with stock internal and external pickup systems

or higher RPM engine

Looking for a way to increase the amount of clean air going into your engine

Pontiac 326 350 389 400 421 428 455 HiRise Aluminum Intake Manifold [Polished] The Speedmaster throttle body beginsThis 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.