ARP Pro Series Rocker Arm Stud - 7/16-14 in Base Thread - 7/16-20 in Top Thread - 1.900 in Effective Stud Length - Chromoly - Universal - Set of 16 111005 They plug into the RS232

They plug into the RS232 computer harness and have two rotary dials for adjustments

2011-2014 Chevrolet Silverado 2500 HDVehicle Applications: 2011-2014 GMC Sierra 3500 HD

75 long and 16 wide

The coating looks great and keeps heat in the tubes

1967-1972 Chevrolet Biscayne

ARP Pro Series Rocker Arm Stud - 7/16-14 in Base Thread - 7/16-20 in Top Thread - 1.900 in Effective Stud Length - Chromoly - Universal - Set of 16 111005 They plug into the RS232Studs offer improved reliability with longer thread engagement in the cylinder head and an extra large radius for reduced flex. Pro Series bolts are rated at 190, 000 psi tensile strength. ARPs product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, IMSA,