|This Performer EFI System is designed specifically for 413-426 Wedge-440 big-block Chryslers. Like all Edelbrock EFI Systems, Performer EFI uses a speed/density system for control over fuel and spark. It includes the exclusive, user-friendly Calibration Module for making adjustments without a laptop computer, and a new Mallory distributor. Edelbrock’s fuel-efficient multi-point electronic fuel injection systems deliver superior performance and the potential for improved mileage. With this system you get total engine control. The result is excellent throttle response throughout the rpm range, great fuel economy with incredible horsepower, smooth engine operation and improved cold starting.