If you use the search function there are quite a few posts on TOR's, Thunderbikes, Staintune and Baffelectomy's. I got the dealer to put short slash cut TOR's on my bike with jetting and filter changes included and total cost was $856.00. I am happy with the sound and if ever pressured by the boys in blue, I can always put the originals back on. This would be an important consideration should the bike have to under go a road worthy for sale as well.
Hope that helped. Best of luck with the mods.