This kit can do up to three things for your truck. Fix stubborn leaks around the injector return tees Fix hard starting due to air leaks in the fuel system * This kit installs new or rebuilt injectors so the job is done without a hitch. Included in the kit: Enough braided fuel line to replace all the lines between all 8 injectors (remember the rule “measure twice, cut once”) 18 spring clamps 16 O-rings, 2 for each injector 8 copper compression washers. These fit underneath the injectors. If you are not removing the injectors, you can save them for later. Four straight tees Four angled tees