I am going to be getting the toyo header/race pipe BUT i dont want my car to wake up all the neighbours ... i was curious if i put in the high flow cat into the race pipe would it quiet it down a notch ? and i guess it woudnt stink as much, but what about the power loss ? and i was thinking if it would be possible to just put in the stock cat into the toyo racepipe (stock one woudnt cost me anything heh.. how much are the high flow cats ? and which onse are good to get ? )so that i woudnt get tickets and shit from cops.. cuz i dont like that heh. and if i was going to go the high-flow cat way.. how much would it cost to put it in.. ??