Pontiac 326 350 389 400 428 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] The Speedmaster steering box for

The Speedmaster steering box for 1955-1957 Chevy vehicles are just the ticket to update your ride

Speedmaster 3rd & 4th gear synchronizer shift keys with springs for Ford top loader manual transmission

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Speedmaster oil filters are the way to go

Our constant growing line of products now include these clutch forks for a variety of applications

Pontiac 326 350 389 400 428 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] The Speedmaster steering box 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.