State level regulations vs. Federal level regulations are ALWAYS going to be an ongoing fight. Here is what the EPA has to say about Catalytic Converters: http://www.epa.gov/otaq/cert/factshts/catcvrts.pdf Now in their wisdom however, the EPA has givin a loophole here. In regards as to replacing a CAT, they say, "Generally, there are only 3 situations where you can install an aftermarket converter." The keyword here being "Generally". They did not say that these are the absolute end-all, be-all situations for legal replacement of the CAT. No, these are the 3 main, "general" situations that you might encounter. And these rules are ONLY for mechanics performing said modifications. These are not for the vehicles themselves, per se. The EPA and state governments have a pretty Laze Faire attitude when it comes to replacement of CATs. Not removal, but replacement. As long as it passes smog, that's all they care about. I've had plenty of people examine my car to make sure that I didn't need a smog pump, and that I had a CAT installed. But no one has ever bothered to check if the label on the cat stated that it was specificly for my vechicle. Same with engine swaps, which contrary to what the person told you on the phone, ARE infact legal. The only requirements being the the new powerplant be the same year as, or newer than, the vehicle it will be installed into. In some cases, there may even be an extra step, such as in California, where you have to bring the car into the Smog Lab to have it tested for emissions requirements. But they're certainly legal. http://www.jagsthatrun.com/Pages/Chevrolet_S-10_V-8_Smog.html Does the sticker on that page look familiar to anyone? :) -Robert vin 6585 "X" To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/