This kit can do up to three things for your truck. Stop Stubborn leaks from around your injector return tees. Cure Hard Starting due to air leaking into the fuel system * e this kit to install your new or rebuilt injectors to help the job run trouble free.Included in this kit: Enough Braided fuel line to replace all the lines between all 8 injectors (remember the rule Measure Twice and Cut Once) 18 Spring Clamps 16 O-rings, 2 for each Injector 8 Compression Copper washers. These go under the injectors, If you are not removing the injectors you can save these for later. Four Straight Tees Four Elbow Tees