Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] oxygen sensors

oxygen sensors

They also feature a non-metallic

Speedmaster oil pan stud kits are undoubtedly the best choice for attaching your Speedmaster pan

Bronze gears absorb the increased wear in special cams and magnetos and are easily replaced before costly damage to the camshaft gear occurs

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