Utilizing the patented "Shark" nozzle, these systems are fully adjustable, 35,50,75 horsepower for 4 cylinder and V-6 applications, and up to 150h.p. for V-8 and V-12 cars. These systems require no engine modifications, operate on stock fuel pumps, and require no timing retards. The ultimate solution to make your import a "Rocket". Any horsepower settings above the recommended levels require "NX Power Booster" fuel additive to prevent detonation. As shown with 10lb bottle Horsepower: 35-50-75-100-150 NX Stage 1 All Imports 20923nxMSRP: $775.00MTR sale price: $550.00 Thank you for shopping Manic Tech Racing.