Now that K&N are officially approved by the coastguard I've got a question, what one to use? I got a couple motors in a Nova race boat (Kiekhaefer 482's with Holley 850 d/p's) that has feet of clearance above the motors. Got me thinking about different air cleaners like the 9" or as big as the 14" or a velocity stack style. Any benefits from any of them?