We had all three like TartanJack said but we recently stopped carrying Injen for a few reasons. The Fujita is just as good as the Injen and sells for much less. If you order through me I'll even sell it to you for an additional discount off what it is on our site. Personally though I have the TRD CAI and I LOVE it. Its a direct ram air system, you can get any better than that, the faster you go the more power your making. Its definately a noticeable difference more so than any of the others ones in my opinion.
Jamie
Some (like me) are into performance mods, but have to do it a little at a time (family, home, kids).
I am watch, reading, listening . . .
I will get an intake, as soon as my suspension is up to where I want it to be.
My priorities:
Interior basics
Minimal exterior (trim and grill)
Suspension
Power.
More of all the above
Why power down the list? Great handling allows more speed carried safely through a corner.
(Defense done)
So, how do the TRD, Fujita, and Injen compare?
(I'd love to hear Ken or Jamie at Sparks elaborate further. They carry 2 of them and had te third till recently.)