S&S Cycle SS310-1204 Hi-Performance Cylinder Stud Kit for Harley-Davidson Touring 17-24/Softail 18-24Big bore, big compression and big throttle take their toll on hard parts and engine studs are no different. If your motor sees any of these we recommend stepping up to S&S Chrome Moly Head Studs. FEATURES & BENEFITS 4140 Chrome Moly studs, oil quenched and tempered to 39 44 HRC 180,000psi Tensile Strength Rounded thread roots, rather than flat, improving fatigue strength Positive stop shoulder allows for consistent installed height
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