Hey, Just after some advice, thinking about useing the 3in super cat converter on a 2.5in system, some people say that this shouldnt be done, going from a smaller system to a larger cat?? what do you guys and girls think??:unsure: And is anyone useing or know of anyone useing these 3in super cat converters (revised version)by Magic performance, they have a flow rateing of 524cfm. Any help would be great:thumbsup::thumbsup: Cheers Boll!