trail-explorer
Adventurer
I'm running similar setup that uses a stock TJ airbox filter under a scoop... works wonders. on dusty trails, I run the fan and is pressurizes the cabin to keep dust from sneaking in around the rear window and tailgate.
I used a very simple method- a wet/ dry vacuum filter over the air intake, attached with a rubber band. It's been on there for 1 1/2 years and going strong. A 3 pack of the small filters is $5 at the hardware store.