I just checked my filter, dirty as hell but nothing went past it. Mopar filter.
I think your easiest and cheapest solution would be to just get rid of all you friends. That way you'll never have to follow anyone, clean air all the time.
PWMAC, I have ran into this kind of filter, mostly on diesel trucks, they have a foam bonded to the paper element. The ones I have seen have a sticky substance on them from the factory. They are desirable for trucks that get used in mines. Coal dust can destroy a engine quickly. Does your son go through a lot when racing?
2014 JKU, JKS lift,Poison spyder flares, bombshell covers,Rancho D2 control arms, JKS adjustable track bars, 35" Tires. GrabBars, Crawler Conceptz rear bumper, Smitty front bumper, Winch. Rough Country inner fenders, Teraflex Disco Mud Flaps
Backseat Dobermann Security