my buddy and i run the hps can. its not too loud at wot, a little pipey in the mid but you rarely ride there in the mountains. the hps cans are the only ones that dont hurt performance based on felkers' testing so he recomends them for high elevation riding. my other buddy rides a cpi can and his sled beats the stock sleds, its not a big difference over stock but its there. i really like the cpi pipe. i really like the hps can, light, quiet for a can and doesnt hurt performance. as for the team secondary. i run one, its nothing special imo, but felker says thats the way to go for the rt so i gave it a whirl. you need to buy the newer team if youre gonna get one. its lighter and sheds weight better without sacrificing strenght. vents are crucial to the xp and the rt, and very necessary to all other sleds.
