The following taken from Injen
Is it okay to change my filter to another brand or type?
You can change the filter but by doing so, you will be altering your Intake
system and voiding the C.A.R.B. status. During testing, Injen
tests each filter design for type of vehicle and making sure that the filter will work in conjunction with the factory ECU and settings. By changing filter designs, it is quite possible that you will get a check engine light. We do not recommend changing the filter from what came with the original Intake
Basically they are saying you can do it, but they don't like it and your on your own. I think it's a safe area to explore getting more power, if I get a CEL then I'll just put the original one back on.