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Im sure this topic has been coved but i cant find it so ill ask. I have heard that on the etche's most aftermarket cans actualy cost u a couple hp and there are only a few that dont cost you hp. Does anyone have any dyno sheets or knowledge on which can runs the best. In the past on my carbed sleds i have been partial to dynoport, i like the sound clip of the etech carbonlite can and fact that it is the lightest but ive heard they loose hp. need advise please help