Lost power big time on the wife's '95 Surburban. It was laboring and basically died the more gas u gave it.
I figured it was a bad/clogged cat and it was.
I bought a new cat and the O2 sensor from a web retailer called Exhaust Warehouse in NY state.
They had the cheapest price on the web, $166.64 with free shipping, got it the next day! and it fit exactly perfectly.........
It was the whole y-pipe cat assembly and it was not 1mm off in fit, and the quality and pipe size looked the same as the original AC Delco pipe that came off.
They did not include any gaskets or hardware, but luckily all mine were perfectly reusable.
Can highly recommend this retailer from my one experience, link is below.
http://www.exhaustwarehouse.com/inde...converters.cfm
I also ordered the O2 sensor from their sister company, both came together no shipping on either.
http://www.bosch4less.com/
Good Luck,
Gordon