Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] Leaks can lead to the

Leaks can lead to the death of your rear end

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

These rotors are made from high-quality materials to exacting standards for perfect fit and function

they're the perfect way to dress up your engine compartment

you can count on Speedmaster for coolant temperature sensors

Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] Leaks can lead to theThe 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.