Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Black]

Brand:	Speedmaster
Part Number:	1-147-078
Part Type:	Intake Manifold, Carbureted
Product Line:	MidRise Air
Engine Block Style:	Stock/OEM standard deck
Carburetor Quantity:	One
Intake Style:	Single plane with divider
Basic Operating RPM Range:	1,500-6,500
Intake Manifold Height:	6.500 in.
Intake Material:	Aluminum
Intake Finish:	Black
EGR:	No
Quantity:	Sold individually.
Notes:	Manifold is 1.25 in. taller than stock.

The 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. NOTE: Hood clearance must be checked as this manifold is approximately 1.25" taller than a similar stock intake manifold.