Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black] Just bolt the pre-assembled unit

Just bolt the pre-assembled unit to the back of the shifter and you are ready to go

Speedmaster air conditioning clutch covers will dress up your engine compartment

They are manufactured from billet aluminum and require no drilling or welding for installation

They are made of lightweight aluminum the polished for a shiny finish

Speedmaster belt drives represent the ultimate in cam timing systems

Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black] Just bolt the pre-assembled unitThe Speedmaster MID AIR design features the identical plenum and runner design as the normal mid rise. The main difference is that there is an open area under the plenum chamber. This feature is sometimes called an air gap design. The air flowing under the plenum provides a cooler charge for the incoming air with less heat transfer from the engine. This cooler air charge provides additional power and torque.