I've read about the benefits of both, open air for more sound and subject to getting dirty more often with only 5 hp gains with a louder air pull noise, and closed with 5-10 hp gains with no sound gains compared to an open air. I'm out in AZ and the temps lean toward the warmer side during the winter and hella hot during the summer. Closed air intake makes sense, but I like the idea of being a little louder. (I had a catback exhaust put on and it's moderately louder and appears to be faster). Anyone here have either or and can attest to more hp or?