Harnesses are the most challenging part of an aftermarket EFI system. There are many choices for main harnesses, injector harnesses, ignition harnesses, and a wealth of auxiliary harnesses. Most packaged kits like the Sniper and Terminator-X systems include the necessary harnesses, but when you get into the more sophisticated systems such as the Dominator assembling a system is an ala-cart process. That's where we come in to ensure you purchase the correct components.