the fmf silincer will not fit stock pipes and vis versa. not to sure on the ttr though. im thinking that they will not fit though. on ebay i see them alot though, europe may be differnt though. aslo check rockymoutainatv.com, try the fmf website or try google. i cant remember the memebers name but there is a member from scottland i believe that did a complete rebuild thread on here. may try pm him and see were he got his parts from. hope it works out for you