Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] Speedmaster gaskets are designed for

Speedmaster gaskets are designed for today's performance transmissions

They will fit 8

rock climbers

these spacers can handle anything your vehicle can dish out

These Speedmaster piston oil ring spacers are used in applications where the piston oil ring groove intersects the pinhole

Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] Speedmaster gaskets are designed forThe 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.