I love my aFe CAI, truck runs like a beast. I recommend buying an extra like I did so when it's time time clean your filter, you can pop in the extra and actually have time to let the old one dry once cleaned. Then next time you change your filter you have one cleaned and oiled ready to go. It beats waiting 24 to 36 hour s for these sicker to dry.
Toyota Tundra Crew Max
This is a well made system for the Toyota Tundra. I have had two K&N cold air system with both of them turning my check engine light on, saying I had a bad mass air flow sensor. If you have a Tundra and want more power and torque go with AFE, its price a little higher than K&N but well worth it.