Mark T has MANY different systems available and I seem to remember him offering some that were adjustable to some degree with removable silencers made from factory baffles. Possibly your stock inner baffles could be of use to him ???. Worth a call forsure !!!

I've got an early set of MarkT's on my bike, have put about 95,000 or so miles on 'em (And I bought 'em used, they had quite a few before that.) I love that they're based on the stock pipes (Double walled, no/less blueing), they increase, or at least don't decrease power, and with the 'bones if I'm going to the Bike Night and wanna rumble with the straight pipe set, I can slap the bones in and have virtual straight pipes. Then, the vast majority of the rest of the time, take the bones out and I get a nice mellow rumble from the glass packs...