Tread size on exhaust studs...??

-

70aarcuda

Master Hoader of SBM
Legendary Member
Joined
Jan 16, 2005
Messages
16,639
Reaction score
5,968
Location
las vegas
Not the stud thread size...

but the nuts that go on the exhaust studs...

I know they are 5/16 thread but what coarse?
 
Exhaust studs on a standard smallblock are 5/16". The head side is 18 T.P.I. and the exhaust manifold side is 24 T.P.I. Geof
 
-
Back
Top