Allstar Stepped Plenum Lightweight Aluminum Carburetor Air Pan is a flat plenum style and is constructed from quality lightweight aluminum. The air pan fits between the carburetor and cowl area to keep the engine heat away from, and direct cool air to the carburetor. The cooler intake air means extra horsepower. The carburetor mounting flange is uncut. It is backed by a 90-day limited factory and sold individually.