Ensure your head of your Cummins stays clamped to your block with a set of Full Send Diesel Clamp Lock Head Stud Kit. This head stud kit is verified and tested to 225,000 PSI ensuring that your head stays down and your head gasket does not fail. Each stud is tested in a range of 222778 PSI to a whopping 250,190 PSI with the average stud being 228,579 PSI. These studs are recommended for stock trucks all the way up to 800hp. Like all FSD products these studs are backed by our lifetime workmanship warranty. This means if you have any issues installing your studs we will send replacements free of charge.