SKU: 274935099255
Speedmaster Pontiac 326 350 389 400 421 428 Dual Plane Mid-Rise Intake Manifold

Part Type: Intake Manifolds, Carbureted

Product Line: Mid Rise Air

Engine Block Style: Stock/OEM standard deck

Carburetor Quantity: One

Intake Style: Dual Plane

Basic Operating RPM Range: 1,500-7,500

Intake Manifold Height: 6.500 in.

Intake Material: Aluminum

Intake Finish: Satin

Carburetor Base Plate Gasket Included: Yes

Square to Spread Bore Adapter Plate Included: Yes

EGR: No

Quantity: Sold individually.

Notes: Works with spread and square bore carburetors.

This is an outstanding manifold for high performance street Pontiac engines. Unlike similar competitive manifolds, the Mid Rise Air from Speedmaster allows unlimited ambient air-flow under the plenum and around the runners which helps create a cooler incoming air/fuel charge which produces additional power..

The Speedmaster Mid Rise 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.