I have a 2000 honda accord ex, ULEV, 4 cyl, living in NH. recently getting the p0420 code and know my cat is bad.

Questions is, do i have to replace the cat with a California specific cat because it's a ULEV engine or can I buy the 49 state emissions cat? looking to buy a magnaflow and it's about $166 vs $380, for the 50 state vs 49 state. Any help would be appreciated. Thanks.

 

if you're in NH just go with the 49 state ULEV cat

 

You should be fine by getting a 49 state cat.