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Speedmaster
M8 8mm Base to 3/8" Rocker Arm Screw In Stud Kit (1.380" Above Hex) Chevy GM LS
MPN: PCE260.1009 UPC: 840136522935
PCE arm stud kits are made of 4140 Chromoly steel. They're roll-threaded, heat-treated to a maximum strength of 190,000+ PSI. and have a black oxide corrosion-resistant finish. They feature larger radius stud fillets for extra strength.