catalytic convertor

[1998gt]

i have a question. my car threw a check engine code p0420 today. was looking at different convertors. how good quality is the zzp downpipe with convertor

thanks

[EHB]

good. but being a high flow cat they sometimes throw a code. they will pass emissions tho. you can either have the code tuned out or buy the O2 emulator they sell

[Mirraco]

I have the zzp 400 cell on my 01 gt. Im still battling a exhaust leak, but with the k n air filter, seems like more air is flowing and car is a little quicker than stock.