Mike has some good points which should be considered. Everything in life is a trade-off. There are no exceptions. You have to decide what is most important to you, and what you are willing to give up to get it.
I am running the JT Air Cleaner system, and I love it. But like everything else, this will not be a universal experience. Mike is probably right about any significant power increase. Though it definitely SOUNDS more powerful with the JT Air Cleaner. Which brings us to the second point. It does introduce a lot more noise, depending on the amount of throttle being used. That gigantic, monstrous air box (Bigger than anything I've had on any car or truck) you're replacing isn't there just to fill up the open space (which it does an admirable job of, by the way). Which brings us to the 3rd point. The vast open spaces you have to work in and the infinitely improved ease of access to previously evil engineering requiring you to risk losing your sanity trying to get to a Spark Plug, Throttle Body or Air Filter.
JT has since added a noise reduction component. It helps, but you still can't call it quiet. I modified my install by using the vortex portion of the OEM air box. I honestly think it helps. But I did not try it before so I can't be sure. In my case, I find that it gives a very mean, throaty growl under hard acceleration, and settles down to a mild output at cruise. That works for me in the sound department. And I love the access.
As for the hot air, I have to agree with Mike, at least to some degree (no pun intended). At stop & go or slow speeds, you are definitely going to suck in some heated, engine compartment air unless you add some type of cold air intake system. Which I have not done. A cold air intake would probably help mitigate the noise somewhat.
On the other hand, I do not have the Fog Lights installed. I had them at one time but they were a waste, in my opinion. I went a different direction for that task. The OEM fog lights are mounted too high and too far back on the Frunk to be effective. So much for the 'All Knowing Engineers'. They just light up the front of the Spyder with no real benefit. I went with LED's mounted low on the front of the Frunk. They work much better and it opens up those 2 fog light ports for a cold air RAM type effect. I also removed the lower splash panels to give the hot are somewhere to go and wrapped my exhaust pipes with exhaust tape. With the huge open area in the engine compartment achieved with the JT system, I think I've got a reasonable setup for air intake temps. At speed, I am getting a pretty good flow of ambient air through the engine compartment. It keeps me, the motor and interior components, including the fuel tank, much cooler.
At some point I am going to install a thermal sensor to find out exactly what air temps are entering the air cleaner in different situations. That should be interesting.
So, in my case, I don't think my intake air is as hot as it could be. Though I don't have hard data yet to prove it.
Did I mention how nice it is to have all that room to work with under the hood now?
