ARP Square Drive Harmonic Balancer, Damper Bolt Kit - SB Chevy R01P003L Main hoops are custom bent

Main hoops are custom bent to fit each application precisely

100% Aramid Center Layer

Absorbs perspiration to keep you dry Light and comfortable

1987-1991 GMC V3500

ARP Square Drive Harmonic Balancer, Damper Bolt Kit - SB Chevy R01P003L Main hoops are custom bentARP offers a special version of its rugged 200, 000 psi rated balancer bolt that can accept a standard 1 2? drive ratchet or breaker bar to facilitate rotating the crank assembly. 1 2? square drive forged into bolt head, enabling the rotation of an engine with any 1 2? drive tool Made from heat treated 8740 chrome moly steel with heavy duty black oxide finish. Since 1968, ARP is the fastener of champions and the world leader in fastener technology.