ARP head studs RB25DET

[OutToWinPAHC]

We'll all of my 12pt sockets are short so I need to go buy one to remove the nuts from the ARP head studs, but I cant find what size it is. I have bought other ARP hardware for my LS6 and Toyota and I seem to recall them using SAE nut sizing though the threads were metric. So who know what socket you used?

[OutToWinPAHC]

Got my hands on a extra long thin walled tapered 1/2 drive 13mm 12 point, perfect fit.

[Carl H]

1/2" 12pt is what you need.

[nismoplsr]

Snapon sockets are known to have thinner walls than a lot of cheaper brands. A 13mm 12pt is what we use on CA18s with ARPs.