Does anybody know of a supplier (preferrably online) that has cataloging or images of air intake hose elbows/fittings?? Looking for items that would normally be found on medium/heavy duty trucks and or large diesel engines. I am needing some various pieces in the 3" to 5" range. I'm trying to engineer an air intake setup for the Cummins in the Sub. Also, does anybody know the diameter of the snorkel fitting on the cowl of a HUM-VEE??