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

This GM Powerglide Steel Direct Drum is manufactured specifically for Powerglide peformance and racing applications but also makes a great replacement for the hard to find OEM parts

then it is the installer's responsibility to verify fitment

They feature a chrome plated dipstick and tube that uses a fully polished billet aluminum handle

Looking for a way to increase the amount of clean air going into your engine

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.