Are you still using the filter in the stock air box?? If you are then this whole concept will have a positive effect on performance. How much? I don't know. Colder air is better. I don't think you can get more restrictive than the stock res through the fender wall so if you just pull cooler air through there you're good. You'd basically just be getting the air from farther away. If I understand what you guys are talking about.
Just my $.02.
