Ok the "official" word from ARP (thanks JDub) is the Studs now use a 14mm nut and not the 9/16th nuts they used to come with.
I suspect this was done for ISO Certification but there wasn't any mention of the change over in the last set of ARP's I bought hence my obsolete information, sorry guys.
I suspect this was done for ISO Certification but there wasn't any mention of the change over in the last set of ARP's I bought hence my obsolete information, sorry guys.