ACES EFI Killshot EZ Tune EFI system is one of the most powerful 4-bbl TBI systems on the market! 650 hp ,4 sets of 100 lb/hr Injectors, designed for 4150 style flange manifolds, 5 Inch handheld tuner with GPS speedometer Features - Remote-mounted ECU to avoid dreaded heat-and-vibration - Integrated timing control & coil driver - Boost Compatible with 3-bar TMAP sensor - 5 inch high res, full color touchscreen handheld tuner with built-in GPS speedometer and tachometer - Simple calibration wizard for initial setup - No laptop required. - Self-learning ECU means you don't have to be a computer/tuning wiz to have EFI. - Laptop tuning also available for pro installation - 2 stage FAN control - Available in base, top end and master kits in black and polished finished (throttle body)