Cosworth Kevlar belt
 

Hi, just fitted new cambelt kit and pump to my sti 2004, is it common for the blue Kevlar belt to leave marks on the idlers, got blue marks on my little idler where I’m sure the gates blue Kevlar belt never left any marks.?

Seen it a few times.

Yep they do that

generally one of the reasons we tend to supply Gates Racing versions.......

You are right. agree with you.