NOS is proud to now offer its popular Powershot and Super Powershot wet nitrous systems in black. The Powershot offers a fixed 125 horsepower increase while the Super Powershot give you adjustable power from 100-150 horsepower. These systems utilize a 1/2 inch thick injector plate and gives you a great power surge at the hit of a button. Fits Holley 4150 and Carter AFB (late), Injector Plate not included, includes Black 10 lb Bottle