just installed the thunderbike 3 system with there cat delete. very easy job and everything fit perfect. the sound is really good. i am used to the thunderbike system on my america but this sounds really good on the r3. very deep bt not to loud. when your riding and open it up is where it sounds really good. havent had it tuned yet still have to get that done. figure the 0054 tune will be just fine. but these are great pipes
Frank
Frank