In the assumption it's my cat that's been giving me the CEL (I've had it turned off 4 times now & it's back on within 40 miles or less every time).
I've considered just gutting the cat & replacing the shell back on the car & wit till my next test to see if it passes that way or not. My guess is it will probably not pass though the engine does seem to run well cept for the piston slap which 99.9% goes away (I can always seem to hear the tiniest bit of click in the engine other than lifter but I hear it because I'm looking for it. Once the engine is truly warm the obvious tick disappears)
I've also considered getting a high flow converter and having that welded in-line It looks though as if there's two catalytics on the same pipe and if I drive my car to a muffler shop bringing with me only one cat, I doubt they would just weld that one cat into the line, they'd want to add another.
Is it two catalytics between the sensors or just one & a resonator?
I looked at this cat & thought about bringing it to a shop to weld in a new ilne: Random cat
I also looked at this one which seems to use two of the random cats & is pretty much "plug & play" cept you need to lengthen the rear O2 wire 12"
Lastly here's different cats for a 2001 2.5 OBW: Different random cats
OK... so another question is if I have just one of these cats built into a mating pipe would that be OK or do I need two of them to be OK & lastly, will this affect my noise level much if I still have the stock exhaust? It's kinda over the top to make a stock station wagon sound like it has balls specially the way I drive.
What I would want would be better MPG & an exhaust that will pass emissions.