![Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black] Due to the large-diameter 13](https://cdn.shopify.com/s/files/1/0762/0316/3867/files/1-147-078.jpg?v=1784105298)
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Due to the large-diameter 13 in
The ends are factory-crimped to eliminate leakage
These 7/16 in
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Speedmaster 7000 Series Cast Body Ready-to-Run distributors are the perfect upgrade for your outdated and worn-out stock distributor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] Due to the large-diameter 13The 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.
