hey 53 chev, i am looking at my instruction sheet, and it says the rotors and calipers are 1970-1978 camaro, but the inner races they come with they make you change to a different set they supply. there is a little difference of some kind.

and it says the inner bearing and race are A-13 or SET 13.
whatever that means. but that is all they say.

if you have any questions, they are very helpful, so you could give them a call.

here is their site.

http://www.performanceonline.com/store/customer/home.php

hope this helps you out. any other questions, feel free to ask...leonard


1957 Chevy 3100 1/2-Ton
Photobucket pictures
In the Gallery