The ARP High Performance Main Bolt Kits are forged from premium 8740 chrome moly and all the bolts feature and generous under-head radius and heat treating for utmost reliability. The threads are rolled after heat treating, which makes them about 1000% stronger than most other main bolts. These bolts are nominally rated at 180,000 psi, and are a premium replacement for any OEM fastener.

Here's just what you need to secure a bellhousing in place. The studs are designed with a radiused head to position the bellhousing and accept nuts without the fear of cross-threading.