Pontiac 326 350 389 400 421 428 455 HiRise Aluminum Intake Manifold [Satin] Oxygen sensors are vital components

Oxygen sensors are vital components that help you adjust to your engine's fuel/air ratio via the electronic control unit (ECU)

Ideal for high-performance street and race setups

The unique

or 8-cylinder engines with a 12-volt

Also includes: Correct Mounting fasteners

Pontiac 326 350 389 400 421 428 455 HiRise Aluminum Intake Manifold [Satin] Oxygen sensors are vital componentsThis 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.