Holley Sniper 2 EFI Self-Tuning Fuel Injection System # HO550-510-3XXFuel Injection Systems, Sniper 2 EFI, Self Tuning, Throttle Body, Polished, 4150 Flange, 800 cfm, Kit Fuel Injection Style: Throttle body Fuel Injection System Type: Single 4 Barrel Throttle Body (4150 Flange) Maximum Horsepower with Gas: 650 Timing Control Compatible: Yes Power Adder Compatible: Yes ECM Included: Yes Self Tuning: Yes User Tunable: Yes Fuel Pump Included: No EGR: No Transmission Controller Included: No Metering Style: Speed density