Chevy GM LS3 Dual Plane 4150 MID-AIR™ MidRise Aluminum Intake Manifold [Black] Speedmaster electric fuel pump is

Speedmaster electric fuel pump is compatible with alcohol or methanol fuels

Superior engineering

With an adjustable vintage plastic snapback closure

and have a maximum pressure of 7 psi with an externally accessible pressure relief valve

This is our top-of-the-line medium profile LowRise+ Series manifold

Chevy GM LS3 Dual Plane 4150 MID-AIR™ MidRise Aluminum Intake Manifold [Black] Speedmaster electric fuel pump isThe 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.