Square Drive Damper Bolts for SB Chevrolet Square Drive

Square Drive Damper Bolts for SB Chevrolet Square DriveARP offers a special version of its rugged 190,000 psi rateddamper bolt that can accept a standard 1 2? drive ratchet orbreaker bar to facilitate rotating the crank assembly. 1 2? square drive forged into bolt head, enabling the rotationof an engine with any 1 2? drive toolMade from heat treated 8740 chrome moly steel withheavy duty black oxide finish Material: 8740 Chrome Moly Finish: Black Material 2: Finish 2: Origin: USA

The nuts feature a wide base for better load distribution and sealing

wide area washer and an extra tall 12-point head that accepts a deep socket and eliminates the worry ofstripping the head

Hardened parallel-ground washers are included in each kit

Made from premium grade 8740 andheat-treated to 190

limited rule oval track competition and street use

you may choose betweenconventional hex style or the space-saving 12-point nuts

or using a spacer for clearance

then allow the nuts to be easily installed without the worry of cross-threading

Finish: Cad

All Pro Series head bolts have areduced wrenching hex or 12-point head and wide area flange to permit the use of larger diameter valve springs and eliminate theneed for valve train removal during cylinder head retorquing

000 psi and are able to easily handle the tremendous acceleration shock loads (shear) and lateral forces (elongation) found in racing

Those first moments an engine runs prior to building oil pressure are when damage can easily occur