FiTech

FiTech Fuel Injection: Modern EFI for Classic Builds

Founded by industry veterans Ken Farrell and Jeremy Schmidt, FiTech was born from a straightforward mission: bring the power and efficiency of modern electronic fuel injection to the classic car and hot rod community without the complexity that had long made EFI conversions feel out of reach. Drawing on decades of combined experience in both OEM and aftermarket fuel injection design, the two founded FiTech in Riverside, California, and quickly established it as a go-to name for builders who want the best of both worlds — the soul of a classic and the reliability of modern fuel management technology.

At the heart of what FiTech does is a commitment to self-learning, wide-band EFI systems that remove the guesswork from engine tuning. Rather than requiring a professional dyno session to dial in fuel and timing maps, FiTech systems continuously monitor exhaust gases and adapt on the fly, making them accessible to seasoned builders and weekend enthusiasts alike. Their Fuel Injection System Kits span an impressive range of applications — from the iconic Go EFI 4 throttle body style units rated for up to 600 HP, to port injection and LS induction systems capable of supporting 750 HP and beyond. Each kit ships with injectors, sensors, wiring, and a handheld color touch-screen controller, so installers spend time turning wrenches rather than chasing down mismatched components.

One of FiTech's standout design philosophies is bolt-on simplicity. Their Fuel Injection Throttle Body Assemblies are engineered to drop directly onto a standard square-bore or spread-bore carbureted intake manifold, meaning a classic muscle car or truck can trade its four-barrel carburetor for a full EFI system in an afternoon. The result is improved throttle response, more consistent cold starts, better fuel economy, and a calibration that tightens up as the engine accumulates miles — all without sacrificing the classic look under the hood.

FiTech's product vision extends beyond the engine itself. Recognizing that many classic car and restomod builds pair a modern engine swap with an electronically controlled overdrive transmission, FiTech developed the Go Shift line of Automatic Transmission Control Modules. These standalone units are designed to manage popular GM transmissions such as the 4L60E, 4L65E, 4L80E, and 4L85E, giving builders precise control over shift points, line pressure, and torque converter lockup — without the need to retain a factory PCM or splice into a factory wiring harness.

Whether you are converting a numbers-matching muscle car, swapping a modern LS engine into a vintage truck, or simply chasing more reliable performance from a seasoned street machine, FiTech offers a well-engineered, thoughtfully supported path to modern fuel injection technology.