hey Greg, pep boys sells this stuff called cat cleaner it comes in a metal can by a brand called cool-it any way it works real good i use the stuff once a year on my ride it helps breakup clogs in the cat cleans your o2 sensor egr valve and the rest of your emmision crap give it a try i've been using it for 6yrs. with great results. good luck bro... later. frank sentrapower-93 +----------------------------------------------------------------------+ Have questions about your car? Try here: http://www.sentra.net
