I'm helping a mate with putting front disc's on his HR and having problems with the overhaul kit that was supplied. It has been suggested that the calipers he bought were either HT/G/K and not HR, yet the inners piston rubbers fit but the outer dust seals don't. The old dust seals had a outer spring type retainer that holds them onto the caliper where as the new ones don't
Hi Malcolm,
I went down this road a few years back when I wanted to fit Torana floating calipers and rotors to my HR front end.
I too, was under the (false) impression that HR were identical to HK/T/G calipers............ I now do not believe they are.
I am of the opinion that the rotor space within the caliper on the latter units is very marginally wider - I am also of the opinion that the thicker rotor can be fitted.
As to the components, the piston size I believe to be identical - boots associated hardware - I don't know.
If the latter caliper were able to utilise thicker rotors - I would opt that way.
But of course your question relates to differences........... sorry, just muttering again without being of any help.......
same,
i tried to fit late model girlok calipers but got disenchanted and in the last week decided to forget everything and fit something that had been engineered to fit...
yet the inners piston rubbers fit but the outer dust seals don't. The old dust seals had a outer spring type retainer that holds them onto the caliper where as the new ones don't 