headbolts

today i went to pasadena honda to pick up some new head bolts for my zc but the ones i got are not the same size as the ones in my head can some one tell me the right size of the twin cam zc headbolts. some one told me that the gray plug zc bolts are bigger then the white plug zc's

89 teg one

Dude - you might need to be more specific - I found that the ZC has a mix of parts from the 89 Integra (d16a1), 91 Civic Si (d16a6) and a few parts like valve cover studs from the 90-93 Integra (b18a1?)

There is an article somewhere on the Internet that gives details about a set of VW ARP brand head botls that fit the ZC. If I find it I will update my post.

i am looking for the size of the bolt head in mm