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- - Emissions (http://www.toyota-supra.info/forums/mkiii-supra/7316-emissions.html)

So, I bought an '87 Supra Turbo a few weeks ago, and started tearing it apart because it does not boost. I believe I have a clogged Cat, and since the moron before me welded it in, along with the downpipe, I cant look at it. My question is, since I have not passed emissions, and putting on an aftermarket exhaust would eliminate the front Cat, should I; A) buy an aftermarket cat, cut out the old one, weld on flanges to the pipe, and put that one in to pass emissions, or B) should I spring for a new exhaust system with a high flow Cat and hope it passes emissions? I know there are more options than this, so if you have any ideas just let me know. Thanks.

Also, should I try passing emissions with a clogged Cat and no boost, or would that make things worse?

Quote:

Originally Posted by drmmr15

do it right and buy a new cat, and exhaust, just make sure they do not weld the exhaust, and flange it, so after you pass emissions, you can put any muffler you wish on it, a clogged cat will make your emissions very bad...