[Mother]

I don't know about more performance. But I use K & N filters in my pick up and I use a 14 x 3 round K & N filter, with the K & N 14 inch hat since my unit went on the road. I like the round filter better than the 2 inch x 18 inch cobra filters because there are less vortexes created by the round filters. I see the oblong filter on alot of the AC Cobra motors. My engine builder suggested using the round K & N filters with the K & N hat beacuse it was best for my engine.