Holley Sniper EFI Quadrajet™ Master Kits-Rochester Quadrajet™ (Q-Jet) 4-Barrel Fuel Injection Conversion - Self-Tuning System with Handheld EFI Controller. Spread bore electronic fuel injected throttle body system that does not require any additional adapters, sealing plates, or intake manifold swaps. four 100lb/hr Injectors, built in timing control, a 3.5" full color touchscreen. The throttle body will support up to 500 horsepower naturally aspirated. Sniper EFI Rochester Quadrajet™ (Q-Jet) system will fit most stock air cleaners and offers multiple fuel inlet configurations that allow for a stock appearing installation.