Late model, high performance applications have larger diameter fuel pump wiring, so a hardwire kit may not be necessary. On older applications, especially those that were not originally manufactured for high power, the fuel pump wiring is often insufficient to supply a high flow fuel pump. In these cases, a hardwire kit is a good option to get the most flow out of your DW pump. Special considerations needed when using in conjuntion with a pulse-width modulated pump controller. Contact tech support for more information.