This Billet LT4 Supercharger Lid replaces the upper supercharger lid on all GM LT4 Superchargers for a quick and clean install. Nitrous and fuel are injected into each cylinder from inside of the supercharger lid, providing direct port style distribution. Systems come standard as a single stage with jetting for 100 to 300WHP. This lid is made from a solid piece of billet aluminum with 1/8NPT machined directly into the lid, which makes it easy to add a direct port water/methanol later on.. Nitrous Express Nitrous Kit w/Billet LT4 Supercharger Lid w/o Bottle. Nitrous System with Billet LT4 Supercharger Lid w/ No Bottle.. Nitrous System with Billet LT4 Supercharger Lid w/ No bottle. Nitrous System with Billet LT4 Supercharger Lid w/No bottle. Nitrous Oxide Injection System Kit. NITROUS; INTAKE; DIRECTPORT; LT4. NITROUS, INTAKE, DIRECTPORT, LT4. Quick And Clean Install. Nitrous Express System. N2OSys. System

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