Join Date: Jun 2014
Location: Near Idyllwild, California
Mentioned: 88 Post(s)
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First off let me say that I really like DDM products and the people that run the operation, no one could ask for better customer service. CAI by anyone brings questions from me.
I have used these in the past, never on a Kappa, but on two Ford 150's, the K&N system and AFE on the FJ Cruiser, and saw absolutely no gain in anything but noise,
On the FJ it truly brought cool air into the engine compartment as it used the original fender inlet that the OEM air box did, I doubt that this design or any that I have seen for the Kappa line does that. It is not enclosed, no tube to bring cool air and sets very close to the radiator and intercooler. Not being enclosed allows water into it in rain (not a worry for me) and a lot more dust access to the filter.
All I have ever seen from them is an increase in noise, no performance gains, actually a drop in performance in mileage on the FJ. I have one setting in the garage, that when I took it off and went back to stock for smog test, my mileage increased and so it seemed the power.
I just need more evidence that it actually does do something other than make noise.