K&N's aren't just horribly efficient at filtration efficiency, but they're also the worst "reusable" gauze type air filter on the market. Their quality has dropped as they've become a household name and market leader. They use only 4 layers of media in their air filters, many other companies use as many as 8 layers.
Anyway, you wouldn't put a "one-size-fits-all spark plug in your truck would you? Or how about a universal motor oil? Then why would you entertain the idea of putting a filter in a Toyota that was not designed for it at all?
K&N only makes one kind of filter...That K&N filter you put in your 4Runner or Tacoma is made of the exact same filtering material K&N recommends for motorcycles, diesels, old carbureted farm trucks, race cars, etc. What does that tell you?
Obligatory K&N rant is over. Thank you, carry on. Be sure to tip your server.