FiTech Fuel Injection System Kit

FiTech Fuel Injection System Kits: Modern EFI for Classic and Performance Builds

For enthusiasts ready to leave the carburetor behind, FiTech Fuel Injection has become one of the most respected names in bolt-on EFI conversion. Their Fuel Injection System Kits are engineered to make the transition from carbureted to fuel-injected operation as straightforward as possible — without sacrificing the horsepower headroom serious builders demand.

A System for Every Build Level

FiTech's lineup of fuel injection system kits spans an impressive range of power levels and applications. Entry-level builders can start with the Go Street EFI system rated for up to 400 HP, while the popular Go EFI 4 targets the broad sweet spot of up to 600 HP and is one of the most widely installed throttle-body EFI conversions on the market. Step up in aggression and the MeanStreet EFI handles up to 800 HP, while the Go EFI 8 Power Adder Plus — equipped with eight high-flow injectors — pushes all the way to 1,200 HP with full data-logging and pro-tuning software included as standard.

For those running dual-carburetor intakes, FiTech offers Go EFI 2x4 Dual-Quad systems rated up to 625 HP, compatible with a wide range of tunnel ram, cross ram, Edelbrock, and Holley intake manifolds thanks to a multi-bolt-pattern throttle body design. Boosted and nitrous applications are also well covered: FiTech's Power Adder kits are capable of supporting up to 25 lbs of boost right out of the box, and can be configured for blow-through turbo, supercharger, or wet nitrous setups.

What Makes FiTech Kits Stand Out

A key differentiator in FiTech's fuel injection system kits is the self-learning ECU. Rather than requiring a laptop and a dyno session to dial in fuel maps, the system adapts to the engine on its own — making it especially attractive for the DIY hot rodder or classic car restorer who wants reliability without a steep tuning learning curve. The Go EFI systems also feature a built-in fuel pressure regulator, reducing external plumbing complexity, and use easy-to-replace GM-type sensors alongside Bosch 4.2 wideband oxygen sensors for precise air/fuel ratio management.

FiTech's Master Kits take this convenience further by bundling the throttle body, ECU, wiring harness, sensors, and a complete fuel delivery system — including pump, fuel lines, pressure regulator, filters, and all necessary fittings — into a single package. This eliminates the frustrating piecemeal sourcing process that often delays EFI conversions. The Force Fuel delivery option mounts under the hood, uses your existing fuel pump to fill a half-gallon reservoir, and maintains a consistent 58 PSI through an internal regulator, keeping the EFI system fed under even the most demanding conditions.

Touchscreen Control and Advanced Features

All FiTech fuel injection system kits include a handheld touchscreen controller for initial setup and real-time adjustments — a feature that empowers tuners to change air/fuel ratios and ignition timing on the fly. Higher-tier systems add full data-logging and pro-tuning software, giving serious racers the granular control they need. Software and sensor compatibility is designed to meet or exceed OEM functionality standards, making these kits a credible upgrade path for factory-built engines as well as full custom builds.

Whether you're converting a numbers-matching muscle car, building a budget street machine, or constructing a boosted race engine, FiTech's fuel injection system kits offer a complete, cohesive solution engineered specifically for the performance aftermarket.