Chevy SBC 350 1957-95 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] These rear-ends have a reputation

These rear-ends have a reputation for being tough to handle the abuse of Circle Track racing

They also help to insulate the carburetor from engine heat and provide clearance for linkages

Minor machining may be required on some applications

Speedmaster H-beam connecting rods are perfect for supercharged and nitrous applications

Chevy SBC 350 1957-95 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] These rear-ends have a reputationThe 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.