If its ported and you are looking for a top end pipe go with CPI's. T-5's are good, no doubt, CPI's are better though, IMHO. Fattys are a good pipe too, I rode a ported shee with Fattys and they were no doubt smooth, however I personally like the "hit" of the CPI's and Toomeys. Nothing like it, make you KNOW you're going fast, fatties kinda lull you there because the power is so smooth.