I recently bought a 96 e350 psd and was glad to find this site.I always liked to upgrade the air intake on previous gas vans, but this intake looks like it rams cool air pretty good. Am i right? Would a cone filter be better?It seems the cone filter would grab more hot air from the engine? Is there anything better? I am having trouble finding any specific applications for upgrade. I would just put a k&n in but have read some bad things about their ability to properly filter.Actually I have raced on dirt with a k&n and have seen first hand that they dont keep it all out. What would be the best upgrade for me