With all the questions about adding aftermarket intakes with any number of filters or the K&N filters.
First on K&N filters: I think they are great for performance and in some cases they work on UTV's but I am of the "opinion" they let entirely too much dirt pass. We have had several customers over the last couple of years who have had to rebuild their engines due to the use of them. I know there is someone out there who has been running them for years in his dust buggy with no problem just like my uncle who has been smoking for 50 years and does not have cancer. If there is such a margin of error in using them and there is a better alternative then simply don't use them on a vehicle that is in a dusty environment.
Look at the picture below of the inside of a well maintained K&N air filter off the desert race rhino we sponsor after one race. They no longer use them either.
Aftermarket Air boxes:
Simple, don't buy one. Why? No real need, your engine can't use all the added flow, the noise is terrible and in most cases you will lose throttle response plus most use a K&N filter which we have already covered.
The Teryx has vacuum controlled carburetors which needs a slight amount of vacuum in the air intake to open and close the throttle slides correctly, your foot pedal only opens the butterfly valve not the actual throttle it opens when there is enough engine vacuum to open them. For this reason if you take the lid off your air box, install a aftermarket air box you will lose this slight amount of vacuum to operate them correctly.
If these companies provided you some very weak diaphragm springs with the kit then it might work.
To change the air intake it has to work in a system format. Need more power then you need more fuel, more fuel means bigger main jets and a needle clip change, now the engine runs rich so we need more air, more air means we lose our vacuum, got less vacuum then go to weaker springs in the diaphragms so you don't need as much vacuum.
It all has to work together and don't get tricked in the flows twice as much air as stock, big deal if the engine can't pump it.
Point is, be prudent on money spent on a air intake systems and stay away from K&N filters for dusty conditions.
We have way too many calling us after they bought such systems and are totally frustrated and if we can head it off at the pass then that is what we want to do.
I am not here to hijack any other vendors stuff, I am here to help you!!
Click the link below of the picture of the filter