ARP 130-4062 Head Stud kit Chevrolet/GM 6.2L & 6.5L diesel, M12

XDP Thread Cleaning Chaser (Sold Separately, See Related Items): Purchase the XDP Thread Cleaning Chaser XD40125TC as an add-on to this kit. Using a Thread Cleaning Chaser ensures that you are able to properly clean the threads in your engine block before you begin installation and torquing of your new ARP head studs. Clean threads are crucial in providing you with accurate torque readings during your engine build or head gasket repair.