Here's what I found for about $16 per 5 at summit racing.
https://www.summitracing.com/parts/arp-662-1007-( MAYBE NOT) 2mm more thread engagement (maybe not with washer)
- stronger by 10 or 20,000 PSI
Questions:
1. Haven't found contact surface of the bolt head. The factory bolts have 11mm of surface pressing on the rod cap. I don't know if this matters much.
2. Our factory bolts list a 65 ft/lb final check torque, and ARP lists 54 or 57 ft/lbs for these bolts. Is it safe to just torque them to 65 since they are stronger?
3. Since they are 2mm HEAVIER, I'm guessing that do to balance this better be an all or nothing application?
This is mostly to avoid the annoying 60 degrees of torque, or for you that are running the engines extra HP.