Quote:
Originally Posted by BRSi
Good question! It seems that both versions with cat and without need the defoulers, so might as well get the one without it!
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Hope you like an exhaust smell that stinks to the high heavens. One of the reasons I got the Vibrant race header with a cat was so that it would have some emissions' compliance-OBD I, and it would provide cleaner exhaust fumes w/o the terrible smell associated with just a race header.
Since a race header with or without a cat is not OBD II compliant, you should probably use a defouler just to eliminate the dreaded CEL monster.