I had good luck with the Pacesetter cats from Rock Auto. I was getting the P0420/P0430 codes but the new cats fixed the problem and have been running great for about 5,000 miles. Parts themselves were pretty cheap although the bolts aren't very accessible so I had to pay a shop to swap them in. Another option is junkyard cats but then there might be an issue with longevity
Catalytic converter wont pass emmission test
in 96-2004 R50 Pathfinders
Posted
I had good luck with the Pacesetter cats from Rock Auto. I was getting the P0420/P0430 codes but the new cats fixed the problem and have been running great for about 5,000 miles. Parts themselves were pretty cheap although the bolts aren't very accessible so I had to pay a shop to swap them in. Another option is junkyard cats but then there might be an issue with longevity