If you're looking to install tunable aftermarket fuel injection on your factory EFI engine, or if you're looking to convert a carbureted engine to multi-point (injector per cylinder) fuel injection, then you're in the right place. We offer a range of systems, one of which is certainly perfect for your budget, technical requirements, and the ability level of the installer.

Installing an aftermarket EFI control system on your engine doesn't have to be rocket science. But success a lot has to do with the EFI system you select. On this page, we lay out some excellent directions for proceeding on your MPFI journey. Need a hand? We're glad to help! Click on the chat icon in the lower corner to talk or complete this easy request form and our technician will create a system design for you for at no cost!

Narrow Your Selection:

• Terminator X MPFI Systems - Plug & Play MPFI Systems for late-model US engines plus kits for classic V8s and universal apps. Balances cost and capability.
• Terminator MPFI Systems - Offers the Plug & Play of Terminator X MPFI Systems but with high-end HP or Dominator ECU. GM LS and Truck only.
• HP MPFI Retrofit Kits - Have a bundle invested in your 4150 or 4500 intake manifold? Convert it to MPFI!
• HP ECU/Harness Kits - Advanced MPFI kits for serious performance enthusiasts at a more accessible price than Dominator.
• Dominator ECU/Harness Kits - Holley's flagship ECU, designed for professional racing teams. Unparalleled engine management and I/O capability.