Holley Terminator X Stealth 4150 EFI systems feature 4 or 8, 100 lb. fuel injectors capable of supporting up to 650 hp naturally aspirated, and 600 or 1250 hp on forced induction applications. The Terminator X ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower! The throttle body has the standard 4150 carburetor flange so it will bolt down where your square bore carburetor was. Holley Terminator X Stealth 4150 systems also include transmission kick-down provisions for GM TH350, TH400, 200R4, 700R4, and Ford's C4 and C6 applications! Fuel Injection - Terminator Stealth EFI - Throttle Body - Square Bore - Touchscreen Included - Aluminum - Polished - Kit Part Number: 550-1004 Specifications Brand: Holley Part Number: 550-1004 Part Type: Fuel Injection Systems Product Line: Holley Terminator X Stealth 4150 EFI Fuel Injection Systems Fuel Injection Style: Throttle body Fuel Injection System Type: Single 4-Barrel Throttle Body (4150 Flange) Maximum Horsepower with Gas: 1,250 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 Intake Manifold Included: No Multi-Port Fuel Rails Included: No Throttle Body Included: Yes Throttle Body Mounting Flange: 4-barrel square bore Venturi Quantity: 8 Throttle Body Material: Cast aluminum Throttle Body Finish: Polished Injectors Included: Yes Injector Size (lbs/hr): 100 lbs./hr. Calibration Module Included: Yes Wiring Harness Included: Yes Oxygen Sensor Included: Yes Fuel Pressure Regulator Included: No Distributor Included: No MAP Sensor Included: Yes IAT Sensor Included: Yes TPS Sensor Included: Yes IAC Motor Included: Yes Quantity: Sold as a kit Note: Supports up to 1250 HP on forced induction applications