what is the right size nut for the arp head stud....i cant seem to get the right one............try a 12mm nope,,,,and 13 seem to fit but after 40ftlb...its too loose to be troque agian............iam stuck on 52ftlb..........is that ok...........for boost..

 

help please............

 

i thought ARP was a US company maybe they are using SAE? try some SAE sizes for nuts? They might make the one side metric to go into the block but the other side for the nut maybe SAE. I don't nkow just a thought.

 

1/2" 12pt deep socket.


Modified by SlowB16si at 3:57 PM 4/20/2008