troppo

Hey Guys,

I have looked exhaustively and can't find the casting number off what I think are big blacks.

Anyway, they are both stamped 89 and have the following casting numbers:
20.4584.00
20.4585.00

Any help would be greatly appreciated!

thanks

troppo

anyone?

Rob Edwards

Greg-

The casting # on one of my stock front calipers from my 1990 GT is also 20.4584.00, below the circled 89. I have a picture but my webserver appears to be sleeping in this morning. I'll post the pic for cross reference soon.

So I think your caliper is the same as mine- I guess you have an S4 caliper (?)

martin D

Greg
If they are only S4 & not big black GTS calipers & you want 322mm brakes then heres how to convert them to big black/reds to take 322mm discs.
https://rennlist.com/forums/928-foru...t-the-red.html

troppo

thanks guys! gotta love the list

Sell84

I have this calipers. Can I fit these on my 78 928?