Anyone got a pic of what the rear brake compensator valve looks like for a 3 door cosworth , or the spec of them so I can get one made up or buy a similar one , cheers

 

buy a 4x4 cosworth one i believe it fits on the abs block on them and are relativley easy to come by. the 3 door ones are in the brake pipe near rear chassis rail and tend to rot badly, vauxhall corsa ones look similar but im not sure on thread size or bias values

 

2wd it's in the brake line at the rear chassis rail.
I believe you can get a replacement from fiesta/escort models.

http://bbs.rsownersclub.co.uk/showthread.php?t=565388

 

I bought a willwood adjustable one , will fit it and have a play with it on the road till it feels right , cheers anyway