89-98 Cummins Thoroughbred Heavy Duty Stud Kit

If you are wanting to keep your 5.9L Cummins on the road for the long haul, you need to replace your head bolts with upgraded head studs. You will need to either have your rocker arm pedestals machined/milled or purchase a set of the Modified Rocker Arm Pedestals.

These head studs have a much higher strength and will not stretch like the factory bolts will. This will help keep your truck from popping head gaskets. The Thoroughbred Diesel Fasteners Performance Head Studs are a Heavy Duty stud designed for stock to moderately built Cummins engines.

• Manufactured by an ISO/TS 16949 certified facility.
• 8740 Alloy Steel material commonly found in tool, engine and even aerospace applications, where overall toughness and wear resistance are key factors.
• Rolled threads for strength and dimensional accuracy.
• Tensile strength of over 220,000 PSI for Heavy Duty Series Kits.
• Black Oxide Finish.
• Chromoly steel 12 point nuts.