Add this kit to an otherwise stock Jeep Grand Cherokee SRT8 and you’ll be running low 12’s in the quarter mile. Mildly modified Jeep SRT8s have already been in the 11’s. The custom Jeep SRT8 fuel rail adapter clears the tight fuel rail connection at the back of the engine and is adjustable from 75 to 125 hp. Included is special fuel jetting for the 6.1L Hemi engine. Zex Nitrous System: Jeep Grand Cherokee SRT8 Adjustable from 75 to 125 horsepower Special fuel line adapter for the Jeep SRT8 engine makes for easy install Low 12 second quarter mile for stock Jeep, high 11 second e.t. with basic bolt-ons. Bottle Options: with Bottle without Bottle