The exup on the thou kills a lot of noise .I tried a viper race can on both my fazers , I could live with it on the thou but on the 600 instant head acheIve settled on a quill can on my thou , no different noise wise to standard
its made of steel tube and you can bolt a top box to it
If your thou is not Ivanised , I would not bother changing to a race can as it will kill mid range!