I have been thinking about modifying the exhausts on my 2002 ST4s. I have Remus DP cans marked "not for road use" and have a PCIII, slotted airbox, K&N filter set up. I don't want to alter the power characteristics, but I wanted to open up the exhaust cans and replace the aluminium sleeves with carbon ones form here: http://www.pjengineering.co.uk/products.php?cat=5&pg=3 It looks a simple job based on other forum resources I have seen. Has anyone done the same thing? Any wisdom to share? Cheers, A PS: Wee update here: So, the 106mm inside diameter tube is the one for standard Ducati or Termigoni pipes. All rivet and support straps are available here too.