Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] rock climbers

rock climbers

For use with cut velocity stacks

and 325 degree hi-temp magnet

The right choice is critical for your engine and your wallet--choose Speedmaster iron distributor gears

This offers strength and no thrusting while torque is applied

Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] rock climbersThe 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.