does anyone know what size the arp nuts are for b16? i tried all kinds of sockets and none fit the nuts. the 14mm is the closest but on the first torque setting the socket got wedged on the nut, so i know at 70ft.lbs they will strip. the studs are new also. my only thought is that i had a 12pt socket on a 6pt nut. i am going to go check that soon

 

for my ls it was 14mm 12pt....have you tried standard 12pt, my rod caps were standard and my head studs were metric

 

the nuts are 6pt. i tried 13mm 14mm 1/2" 9/16" 2 were too big and 2 were too small

 

there are standard sizes in between those. Try going to sears or harbor frieght with the nut

 

i looked down inthe head and it is a 12pt nut. i used a 13mm 12pt socket and all is good

 

All the ARP 7/16" hardware I've ever used has 13mm 12pt nuts.