Holley Performance Products is proud to announce plug and play wiring harnesses that allow the use of Holley HP and Dominator EFI systems on Gen III Hemi engines! These Holley EFI harnesses provide a plug and play solution for the main, injector, ignition coil, and drive-by-wire harnesses needed to fire your Gen III Hemi up with Holley EFI control! The main, ignition coil, and drive-by-wire harnesses are available for either early or late model Hemis. The injector harness is available for either USCAR or Jetronic style fuel injectors. For more information regarding each harness, check out the individual product pages HERE.