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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: 2001-2010 Chevy GMC 6.6l Duramax LB7 LLY LBZ LMM Engines.
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