ARP High Performance Head Bolt Kit Oldsmobile 307/350/455 cid (1977 & Later) 1/2"

ARP's High-Performance Series Head Bolt Kits are available with a reduced wrenching hex or 12-point and wide area flanged head that eliminates the need for valve train removal to facilitate cylinder head retorquing. All High-Performance Series bolts are 180,000 psi tensile strength, which is 15% stronger than Grade 8 hardware. These kits come complete with hardened parallel-ground washers. Also available in Professional Series Head Bolt Kits.

Features:

• Reduced wrenching hex or 12-point wide area flanged heads
• 180,000 psi tensile strength
• 15% stronger than Grade 8 hardware
• Includes hardened parallel-ground washers
• Black oxide or stainless finish