I bought some cheap wilwood 4 pot calipers of eBay. They are the old style billet dynamite as far as I am aware and the number 120-5321 seems to relate to ones for Clio using a 1” vented disc (any more info gratefully received including range of disc diameters they fit). I am hoping to resolve and fit to 260mm escort rs vented discs under the 14” wheels on my Anglia, will need to make up a bracket.

The question is, they have unequal pistons so which way round do they go, small piston hitting disc first or last?

Small piston is the leading one.

Thanks. So as the wheel turns the small piston sees the disc first. Will check out fitment when I have a few minutes and check out the caliper pistons to see if they need replacing or just the seals.

Just to check, if the caliper is in front of the wheel the small piston will be at the top and if behind at the bottom.

[Edited on 14/5/18 by Ugg10]

[Edited on 14/5/18 by Ugg10]

Yes that's how I understand it.

Thanks again.