ARP Square Drive Harmonic Balancer, Damper Bolt Kit - SB Chevy HB22001 the X1 is designed to

the X1 is designed to span the entire range of applications providing dependable fuel pressure regulation

providing increased flow and greater dust holding capacity

For carbureted applications use regulator P/N 13204 or P/N 13304

1988-1991 Oldsmobile Delta 88

Button Head

ARP Square Drive Harmonic Balancer, Damper Bolt Kit - SB Chevy HB22001 the X1 is designed toARP 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.