nigel hunt wrote:thats the next question as i cant make out what model it is , how do i tell what model mc18 it is ?

Take a look at the model history page on the website. My way of doing an easy approx way is the later 18 models have a high level pipe with a stainless section between the expansion chamber and the cans, tho this doesn't work if the exhausts have been changed out. Next way is looking at the pgm, PGM I for early and PGM II for later. Others will undoubtedly tell you the correct way