Holley's Sniper electric fuel injection master kit is designed to fit single + dual carburetor manifolds and incorporates all the required sensors, fuel regulator, and ECU into the footprint of a conventional square bore carb. Answer a few questions on the included backlit LCD control module and the Sniper EFI's self-learning ECU determines the fuel tables and tunes itself! Available in 600hp and 1200hp application versions, the Master Kit includes all the necessary fuel system components such as a fuel pump, fuel filter, feed and return lines with fittings.