Chevy GM LS3 Dual Plane 4150 MID-AIR™ MidRise Aluminum Intake Manifold [Polished] They feature a sleek chrome

They feature a sleek chrome finish with an aluminum housing and have a 100 amp capacity

unlike plastic alternatives

improved throttle response and better fuel economy

The Speedmaster high mount serpentine kit for Chevy LS engines

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] They feature a sleek chromeThe 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.