The Holley Sport EV1 Milspec injector harness utilizes Raychem DR-25 heat shrink tubing and transitions, providing protection from extreme temperatures and external contaminations that frequently cause reliability issues. The injector connectors and pins are Bosch Motorsports pieces featuring double spring contacts and sealed boots. The injector harness is designed and labeled for conventional 1-3-5-7 and 2-4-6-8 cylinder layouts (Small, Big Block, LS Chevrolet and many others). Additionally, this injector harnesses includes a mating 12-Pin Deutsch connector and pins, allowing you to easily upgrade any wiring harness that utilizes EV1 injectors.