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The Nitrous Express billet LT4 supercharger lid replaces the upper lid on GM LT4 superchargers to enable nitrous and fuel injection into each cylinder from inside the lid for direct‑port style distribution. Machined from solid billet with 1/8 NPT ports, the lid simplifies installation and provides a clean, integrated appearance. Systems are single‑stage with factory jetting for approximately 100–300 WHP and allow easy addition of direct‑port water/methanol later.
Nitrous Express Nitrous Kit w/Billet LT4 Supercharger Lid w/o Bottle
