RECOMMENDED FOR APPLICATIONS EXCEEDING 80 PSI OR SMALL TWIN TURBOS PRODUCING NOT MORE THAN 80 PSI.
THE HEAD BOLT HOLES IN THE CUMMINS BLOCKS ARE NOT TAPPED TO THE BOTTOM. WE HAVE DESIGNED THESE STUDS WITH MORE THREADS FOR LESS STRESS TO THE BLOCK AS WELL AS THE STUD. YOU WILL NEED A 12MM X 1.75 BOTTOMING TAP. IF YOU DO NOT HAVE ONE, WE HAVE THEM FOR SALE.
