Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black] They're also available for most

They're also available for most popular automatic transmissions

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

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

You can choose between a 1-wire (Battery sense wire from the plug must be connected to the battery positive

Speedmaster air conditioning clutch covers will dress up your engine compartment

Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black] They're also available for mostThe 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.