A good number of suppliers who can make quads Nigel. Zero's, adjusted standard boxes, Powerflow etc. Problem its quite a subjective subject.

I'll pop the questionnaire over to your email in a mo. A few threads on exhausts for you to read once 'green'.

Quote Originally Posted by Xavier View Post
While we are on the subject of exhausts I will need to replace mine this winter and wondered if anyone knew of the best quad type out there please?