Quote Originally Posted by EBG 18T View Post
A HFC is still better than the OEM Cat, but it will not provide you the gains that a TP will. I went from a TP to a HFC and i know i lost a few HP, but not enough to be concerned with. I prefer the HFC since it won't be poluting as much as i was with just the TP.
Leave worrying about pollution to the Prius's. I like to drive next to Prius's on the road so we can be a moving contradiction.