Holley Sniper EFI Self-Tuning Fuel Injection Dual Quad System # HO550-527 Fuel Injection System, Holley Super Sniper 1250 HP, 4150 Flange, Self-Tuning, Aluminum, Polished, Throttle Body, Kit Fuel Injection Style: Throttle body Fuel Injection System Type: Dual 4-Barrel Throttle Bodies (4150 Flange) Maximum Horsepower with Gas: 1,250 Timing Control Compatible: Yes Power Adder Compatible: No 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 Airflow Rate (cfm): 1,600 cfm 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: No TPS Sensor Included: Yes IAC Motor Included: Yes Quantity: Sold as a kit. Notes: The Sniper EFI 4150 2x4 was designed for use on naturally aspirated engines. The system requires a high pressure fuel pressure regulator and fuel pump capable of supplying the fuel demand and maintain 60 psi of fuel pressure at all conditions. Holley Sniper EFI Self-Tuning Fuel Injection Systems Holley Sniper EFI self-tuning fuel injection systems deliver all the benefitsand none of the hassles. These full-featured throttle bodies are easy to install, can support a lot of horsepower, and will keep your budget intact. They put an end to carburetor cold start issues, hesitations, vapor lock, and flooding. Each Sniper EFI self-tuning fuel injection system includes an internal fuel pressure regulator (preset to 58.5 psi), eliminating the hassle of plumbing an external model. Make your conversion simple, while getting maximum bang for your buck with a Holley Sniper EFI self-tuning fuel injection system. Order the model for your application needs.Holley Sniper EFI self-tuning systems feature: Available finishes: black ceramic, classic gold, and shiny Available in base and master kits (master kits include complete fuel system: 20 ft. of Earl's Vapor Guard fuel hose; 12-920 fuel pump; filters; necessary hardware, and bulkhead fitting for returning fuel to tank) Dual-pattern bolt-on carburetor replacement, designed to fit 4150 flange and spread-bore manifolds (spread bore sealing plate 9006 recommended) Supports up to 650 hp with four 100 lbs./hr. injectors 4-wire vehicle connection: battery +, battery -, switched ignition, and rpm Integrated ignition timing control and coil driver Color touchscreen for setup and gauge views Calibration wizard and self-tuning, integral-mounted ECU no laptop required