Tors
I recommend getting rid of the cat box though
I had Tors installed from new but still had the cat and i couldn't notice much difference
until i parked it next to another stock rocket and it was louder butt nothing to write home about
so i had the cat removed and the spaghetti pipe thingy put in and it sounds much better

I did get a fair bit of decel popping with the aftermarket triumph tune they put in though but i have since installed triple K&N filters + 02 eliminator and tuned to suit with tune Ecu and this has reduced the decel popping to Immensely
Regards Mitch