well if its your cat being clogged. just wait till moms isnt home and get about 4 cups of laundry detergent and set it on the longest wash setting you have. MAKE SURE YOU USE HOT WATER THIS IS KEY! no need to put it in the dryer since the exhaust gases will dry it out.
serious note try gutting your cats and get eliminators then go to a junkyard and get a used cat. or all new manifolds back. might free up some power for you. id keep the stock intake since i havent really seen anyone showing gains from the cheapo ebay intakes. most all of them look the same to me anyways. from aem to kkm. clean out your uim as best as possible. all this shouldnt be more than 80 bux max