Speedmaster 1-147-076 Fits Oldsmobile 400 425 455 MidRise Air Intake Manifold Satin

This is the only available high rise high performance single plane with divider manifold for this engine. It is an inch and a quarter taller than competitive manifolds thereby producing more power. The MidRise air design provides an air gap under the plenum chamber which helps cool the intake charge providing additional power. Available with machined injector bosses. NOTE: Hood clearance must be checked as this manifold is approximately 1.25" taller than a similar stock intake manifold.

• Open area under the plenum chamber "air gap" design.
• The cooler air charge provides additional power.
• Cast from steel molds for a tighter grain and reduction of porosity
• Pressure tested to ensure maximum performance