I think BC did an improved top mount on the later shocks did they not?

How old are yours?

What you got on now Dan?
I've just bought me a present to replace the AST's that have a leak, might get them refurbed and flog them or just sell them as they with the knowledge they need looking at 😉

@BrownPantsRacing - they're around 2 1/4 years old. Done it from the word go.

Can't remember when they introduced top mount, but may be that you have the older design which I'm told knock more.

Thank you! - I'll do some digging :)