If you are using our Stealth aluminum cylinder heads, these brand new head bolts are just the ticket. Featuring very high strength, but still at a great price, these are the way to go. Priced at a fraction of the cost of the name brand bolts, these are custom made for us by one of the largest bolt manufacturers around. They feature reduced diameter 12 point heads for easy access in applications that have countersunk head bolts (such as our Stealth aluminum heads or Edelbrock Performer RPM heads), but they also work great with factory iron heads. Rated at 170,000 PSI, they are far stronger that the factory head bolts, or even a standard type grade 8 bolt. We even include .100" thick hardened washers with them. One set contains enough bolts for two heads (one complete engine.)