Nitrous Express
NEX Nitrous Oxide Kits
Part # 20939-12
WARNING: This product can expose you to chemicals known to the State of California to cause cancer or reproductive harm. More info at p65warnings.ca.gov.
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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.