These harnesses are designed to fit most 24x and 58x LS engines, from 1997-2012. They are a perfect fit for installers wanting to mount the any Holley EFI ECU inside of the passenger compartment where it is away from the elements, and easy to access.

Holley EFI LS Main Harness; For Use w/58X 1997-2012 LS Engines; Plug And Play; Extended Length;