Yes. Your Dodge Ram should pass the smog check with the Free Flow Exhaust
and K & N Air Filter so long as its emissions fall within California
requirements. The components you've mentioned are legal. So long as the
exhaust system modification is after the CAT and you've made no
modifications to the exhaust system other then adding the free flow system
after the CAT, you'll have no problem. As far as the air filter... Since
you've made no change to the air filter box and have only change the filter,
that too will not cause a smog check problem. We do recommend however that
you switch back to the stock air filter just for security. Your Dodge Ram's
computer is programmed to accept data from the Mass Air Flow sensor matching
air flow through a stock air filter.
posted by SmogTips Support
