Chevy SBC 350 1957-95 MID-AIR™ MidRise Aluminum Intake Manifold [Black] The Speedmaster MidRise Air design

The Speedmaster MidRise Air design features the identical plenum and runner design as the normal MidRise

To remain street legal with a square bore carb

On the outside we've added a heavy-duty

They weigh only 2

They are built from strong

Chevy SBC 350 1957-95 MID-AIR™ MidRise Aluminum Intake Manifold [Black] The Speedmaster MidRise Air designThe 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.