Hi, I'm new the the forum.

2000 Honda Accord EX V6 3.0L
210K and going strong.

I just had my EGR valve replaced and it looks like I need a new cat converter.
(error codes 420, and 1457)

I've been finding conflicting information from site to site on which part will fit. I'm looking for a direct fit OE as well.
Any part/vendor/site recommendations? Not looking to spend more than $200.. Is it worth it to replace the 02 sensors as well?

 

Well if your looking for an oem cat, you will probably be spending over 200 dollars. And it would probably be a good idea to go ahead and replace o2's...

 

I have been dealing with a very similar problem. The only reason that the rear O2 sensor is there is so the ECU can detect the efficiency of the CAT(look for certain electric signals to compare to signals from the front O2 sensor. You may only have a bad rear O2 and the CAT may be fine. Have you had any other issues with the engine-----rich running or the like. If so, your CAT may be getting blocked. My CAT was almost totally blocked so I went to a salvage yard and found a good(totally clear) used OEM CAT for $150. But then, I gutted my old CAT(the front half, as the back half was clear) and reinstalled it until I can sort out if there is any other problem before I install my new used CAT. I gotta tell you that the car now performs like crazy. I cannot remember it having so much power. Of course it is throwing a CAT EFFICIENCY CODE. Da---yah---no cat at all.