I recently got a p0420 code for 2004 Accord V6. It was for the bank 1 converter and I have been looking at aftermarket converters because I cannot afford OEM, sadly. I have seen Walker, Eastern, Bosal, etc... but I wonder which ones are good? If you have any experience with any of these brands I will be glad to know!

 

Not sure about the others, but I've used Magnaflow catalytic converters on both a 2002 Accord and a 1998 Acura CL with no issues. As long as you don't have to cut the original one off, you can bolt the new one right on. Just make sure you pick up new OEM gaskets.