I'm not sure.
Right now I have some problem about emission test.
NOx GPM Limits 3.0000
my badboy was 3.2179
so I didn't pass emissions.
I have long tube header & Magnaflow Catalytic Cat Converter from ebay last year.
http://cgi.ebay.com/ebaymotors/BMW-3...spagenameZWD1V I still don't know what i'm gonna do.
should I buy a new Cat or get new Oxygen sensor?
