Only select models come with the in cabin filters but all can have them added. Personally, this is my 2nd Titan with the filters and they do nothing..they're not even charcoal activated so they do nothing for odors (I believe you CAN find them with charcoal but the stock ones don't) and they just impede air-flow. But in any event, here's a HOW TO. You can search the forum for all this stuff.
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