Chevy GM LS3 Dual Plane 4150 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] Step up to the high-rpm

Step up to the high-rpm power of an open plenum with Speedmaster HiRise intake manifolds

unlike plastic alternatives

They also offer the potential for improved fuel economy by making the engine more efficient

They feature cast iron construction and are powdercoated to protect against corrosion

Chevy GM LS3 Dual Plane 4150 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] Step up to the high-rpmThe Speedmaster MidRise 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.