Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black] Each kit comes with high-torque

Each kit comes with high-torque motor

These 7/16 in

Speedmaster cylinder head fasteners are made from aircraft quality 8740 high tensile strength chromoly steel and cold-forged to ensure molecular integrity

They will fit 8

Speedmaster 7000 Series Cast Body Ready-to-Run distributors are the perfect upgrade for your outdated and worn-out stock distributor

Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black] Each kit comes with high-torqueThe Speedmaster MID AIR design features the identical plenum and runner design as the normal mid rise. 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.