I actually in testing with my Dual Intake system, that I have gotten better results with a foam filter. I've been designing my own filters. For the best results I would need a filter that would have chance of fitting in the very few spots you can tuck a filter into. In addition to filters, I have been working on a new sleek radiator spill over tank, that would replace the big stock plastic one. By doing this I am opening up a some great real-estate for a new home for a filter. The design of my Intakes system works extremely well, however I just would like to get the passenger side filter a little bit further away from the engine. Even though I have two ram air feed tubes supplied for each filter with more then enough colder out side air, I still want it to match the same set up as the other side. By having the filter being tucked in by the headlights. Yeah this car has more Scoops then 31 Flavors now!