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The Nitrous Express billet LT4 supercharger lid replaces the upper lid on GM LT4 superchargers to provide direct‑port style nitrous and fuel distribution into each cylinder. Machined from solid billet with 1/8 NPT provisions, it offers a quick, clean install and ships as a single‑stage kit with jetting for roughly 100–300 WHP. This listing includes a 10 lb nitrous bottle when ordered with bottle.
Nitrous Express Nitrous Kit w/Billet LT4 Supercharger Lid w/10lb Bottle