Yup!!!!!!

I can't find chapter and verse right now but EPA standard is 70% CO, 70% HC, 30% NOx.

CARB has more stringent standards of : 70% CO, 70% HC and 50% NOx on 3-way converters (60% for 3-way with air injection).

None of these (OBDI) require "certif... Login to read more.