Running high horsepower & torque is hard on your rods!

Upgrading the rod bolts and main studs is a must if you plan to use your engine for competition purposes.

220K PSI Tensile Strength
12 point, 12mm head

Fits: 2001-2016 Chevy GMC 6.6l Duramax LB7 LLY LBZ LMM LML

Stretch bolts 0.0070-0.0075"
Or torque to 95 ft-lbs with lubricant