Sniper 2 EFI Master Kit Return Retrofit

The Sniper 2 EFI Master Kit Return Retrofit is Holley's complete fuel injection solution designed for engine builders and restoration enthusiasts converting carbureted or older fuel systems to modern electronic fuel injection. This retrofit addresses the growing demand among performance and classic car builders who want reliability, precise fuel metering, and cold-start capability without sacrificing authenticity or simplicity.

At the core, the Sniper 2 EFI Master Kit features a return-style fuel system configuration, meaning fuel flows through the injectors and excess fuel returns to the tank, reducing heat buildup and keeping fuel temps stable under sustained throttle—critical for naturally aspirated and supercharged applications alike. The system includes a self-tuning capability that automatically adapts to your engine's displacement, induction design, and ignition curve, eliminating the guesswork of traditional carburetor jetting.

Holley's integrated wiring harness, fuel pump controller, and detailed installation documentation simplify what could otherwise be a complex retrofit. The compact design and clever mounting options work with most engine bays without requiring extensive fabrication or trimming of original structures, making it ideal for classic car restoration, hot rod builds, and carbureted engine conversions.