Painless PERFECT engine management system for 1997-2004 5.7L GM engines will solve the dilemma faced by so many people who want to upgrade their Hot Rod, Classic truck or SUV to fuel injection. Painless solves the problems of which ECM to use and how to program it for maximum performance in the transplant environment. With the PERFECT engine management systems from Painless, you don't have to be a rocket scientist to get maximum performance (that was Painless Performance's job).

Benefits & Features Include:

• More power
• More torque
• Less fuel consumption
• Easy plug and play
• Converts mass air to speed density
• Compact, waterproof, fully programmed, and dyno-tested ECM
• Simple, easy-to-understand installation