Want to fit a new exhaust and thinking of plumping for the Supersprint Race exhaust (single pipe exit) with unsilenced centre section or silenced optional fitment, not decided yet. I have been told the diameter of the exhaust tubing is 2.75 inches. I currently have a Milltek high flow cat which is of 2.5 inch diameter hence I'm needing someone to supply a sleeve to marry the two up and fit the exhaust for me. Has anyone had to have something similar to this done and/or can recommend a reputable company who would be willing to do this ? I would be interested to hear from anyone with this exhaust, being described as a race application I'm wondering whether it may be too loud ?