Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] 1019-PCE164

1019-PCE164

Speedmaster oil pan stud kits are undoubtedly the best choice for attaching your Speedmaster pan

If you want the awesome look of a chrome alternator but your GM alternator is working great

oxygen sensors

Speedmaster Steel main girdles are machined from 1045 steel

Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] 1019-PCE164The Speedmaster MidRise Air design features the identical plenum and runner design as the normal MidRise. 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.