EFI Upgrade Kit 4150 Throttle Body

The FAST EZ-Fuel EFI Injection System offers a user-friendly conversion from carburetor to electronic fuel injection, eliminating the need for extensive tuning experience or a laptop. Its patent-pending self-tuning technology utilizes a hand-held display and a setup wizard to configure the system, which then optimizes fuel delivery as you drive. The system includes the ECU, a Bosch wide-band O2 sensor, a clearly labeled wiring harness, fuel injectors, and a black anodized 4150 throttle body with Holley-style linkage. This throttle body offers over 1100 CFM and is designed to work with existing 4150-type intake manifolds and original carb-style throttle linkage. It also accepts common OEM sensors and can be installed in an afternoon. While it provides the core EFI components, it explicitly excludes the in-tank fuel pump, allowing users to select their preferred brand. The system also features built-in diagnostics and a "limp home" mode for added reliability. It is compatible with original carb-type ignition systems, including HEI.