OK, I have searched the forum and can't find the actual dimensions of the stud nuts. Anyone have the dimensions? Boxter doesn't have any on hand, I want to replace the old ones with new ones along with the washers.

You're probably going to have to be a little more specific. Like intake/exhaust studs etc...? 8x1.25 on those.

for exhaust I like teh 8m x 1.25 nuts with the 12mm hex head. teh most commom is a 13mm wrench size but the 12mm wrench size gives more clearance for your socket to tighten her up

Wheel studs are 14mm x 1.5

Just another guess at WTF you are asking.

oops, sorry, crankcase stud nuts or cylinder head nuts for some. I would prefer to have new nuts and washer's to torque the cylinder head down with.