Edelbrock 8550 Cylinder Hex Head Bolt Kit
The Edelbrock Cylinder Head Bolt Sets are manufactured by ARP and are cold rolled and heat-treated prior to thread rolling and machining.  They feature reduced diameter bolt heads eliminating the need for valve train removal when re-torquing cylinder heads and permit the use of larger diameter springs.  Each complete set of head bolts is of the highest quality and includes hardened and parallel-ground washers.  These bolts are rated at 170,000 PSI.