Add this kit to an otherwise stock Jeep Grand Cherokee SRT8 and you’ll be running low 12s in the quarter mile. Mildly modified Jeep SRT8s have already been in the 11s. The custom Jeep SRT8 fuel rail adapter clears the tight fuel rail connection at the back of the engine makes for an easy install. The system is adjustable from 75-125 horsepower. Special fuel jetting for the 6.1L Hemi engine is included. This kit does NOT come with a bottle.