Jeepers who have to pass emissions tests usually know that exhaust modifications downstream of the catalytic converter are allowable as long as the vehicle stays within acceptable sound levels.
GRASS LAKE TWP., MI — Thieves Thursday stole catalytic converters from four vehicles parked at a lot near I-94 and Mount Hope Road. The four vehicles — two pickup trucks, a jeep and a Cadillac of some ...
Answer:That's a new one for me, and I cannot see it having any effect on preventing a P0420 DTC, but it is illegal. P0420 indicates the catalytic converter has lost its efficiency in reducing harmful ...
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