Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] Looking for a way to

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

Speedmaster aluminum crankshaft pulleys are manufactured from 356 aluminum that is heat-treated to T-6 specs

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

you can count on Speedmaster for coolant temperature sensors

then it is the installer's responsibility to verify fitment

Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] Looking for a way toThe 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.