Willwood stud size larger than stock??

[g356gear]

I just installed a set of 13" rotors and 6 piston calipers on my 69 Camaro. The studs on the spindle are larger than my stock lugs. Anyone know what Willwood uses for stud size? Thanks.

[Larry Callahan]

1/2"-20? Any chance you have a caliper?

[g356gear]

1/2"-20? Any chance you have a caliper?

I don't. I may have to take the spindle into the tire shop and get them to check it. I was hoping somebody might know off hand.

[novaderrik]

grab a 1/2" open end wrench and see if it fits snugly over the stud.
if the 1/2" wrench is too big, then try a 12mm.
they are probably 1/2"- that's the standard upgrade stud size for GM cars.

[ProdigyCustoms]

Larry is correct. They are 1/2" X 20

[JRouche]

Yup, I just threaded my wilwood studs in today and thats what they are. If the thread through the back of the hub then they are correct. JR