The easiest EFI system you'll ever install, FAST's EZ-EFI Self-Tuning Fuel Injection Kits bolt to any 4150 carbureted engine up to 650 horsepower in just one afternoon (no manifold replacement needed). Simply hook up the system, answer the Setup Wizard's questions on the handheld unit, and EZ-EFI tunes itself as you drive! EZ-EFI works with any ignition and provides integrated diagnostics. For more aggressive applications, the EZ-EFI Dual Quad Upgrade Kit can handle 1200+ horsepower engines with dual quad carbureted manifolds.
No laptop or tuning experience required (Setup Wizard guides start-up & system tunes itself)
4150 throttle body works with original carb-style throttle linkage
Compatible with all ignitions, including HEI, and uses all OE sensors
Throttle body flows 1100+ cfm with the largest modern injectors and adjustable fuel pressure
Standard single throttle body system supports up to 650 HP; Dual Quad Upgrade supports 1200+ HP
Built-in diagnostic tools and Limp Mode designed to offer maximum engine protection should trouble arise