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[Brock]

I have only used the Volant CAI on my Dodge Cummins....not done anything to the FJ like that yet but they just updated. There are some differences between them though in my opinion. Some of the AFE and others call themselves CAI but are really warm air as they leave cone filter exposed with three or four heat shields to keep direct heat away.

The Volant, is the best of them all if you want a solid design...sealed box....great filter media with high flow. For that matter the oem setup is also a CAI just a different configuration. If someone had an aftermarket tube that goes from fenderwell to filter box that had fewer angles in it......and then dropped in a high flow filter for oem setup like AMSOIL or K&N.....I think you would get the same result as spending $500 on one of the others. You might come damn close with just the airfilter difference alone....
CAI has sealed box with air intake outside of engine compartment....and that is what we get from factory.
Just something to ponder.