Does anyone remember the part number for the ARP studs. I contacted them and got a very prompt response with a query. "Do they have a guide nose or bullet nose on the end?". However I don't know the answer to this. I am sure I saw a photo of someone's ARP exhaust studs but of course cannot find it now. I do have 5/16" UNF K/Jet nuts in my garage but they are titanium and that tends to gall, so unsuitable for exhaust stud nuts. I will order 4 of the silver plated ones from LAS.
Wilson
PS Could not order 4 nuts as at £1.22 each, below the minimum order, so ordered 8 nuts to have a spare set, which means they will never ever be needed (reverse Murphy's law). W.