Harmonic Balancer Bolt, 12-Point Black Oxide AR134-2501 Product:fits SB Chev 7/16-20 Thread x 2.470" UHL, 5/8" Socket AF401-08BLK-25

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Harmonic Balancer Bolt, 12-Point Black Oxide AR134-2501 Product:fits SB Chev 7/16-20 Thread x 2.470" UHL, 5/8" Socket AF401-08BLK-25Harmonic Balancer Bolt, 12 Point Black Oxidefits SB Chev 7 16 20 Thread x 2. 470" UHL, 5 8" Socket AR134 2501 134 2501 HARMONIC BALANCER BOLT As the crankshaft flexes and twists, the harmonic damper absorbs incredible amounts of kinetic energy. To ensure that the damper is locked in position, ARP has developed these ultra strong 200,000 psi bolts that let you exert maximum clamping force. Special features include 1 4" thick, wide area washer and an