This is a high-quality, pre-made wire harnesses for the Evo 4-9. It has connectors for Denso coils and connects right up to the stock Evo connectors for use with a Coil-on-Plug ignition system. Select your style connectors depending on the type of coils you are using with your setup. We also offer extended-length harnesses for cars with a wire tuck (made to order). The wire harness is complete and ready to be installed on your coil-on-plug setup. Check out the other listings for a complete setup or individual pieces for your COP setup.