Someone is serious about cooling. We assume these lead to blast tubes. Just how big is the alternator on this RV?
In Case You Missed It
The Home Machinist
How do you turn out non-cylindrical objects with your lathe? Why, by using a four-jaw chuck, of course. And there's a way to effectively employ that 'ole' adjustable wrench that might have escaped you for years; by Bob Fritz.
Build a Custom Plenum That Will Work
Dave Anders - 3
For optimum performance, all it takes is a little bit of math and some fiberglass.