I remade tube #4 without the clearance ripples. But i pretty much used every ounce of space i could near the port exits. I mainly posted this for Tony, I'd like to see what he's working with on his Scamp. From what i remember they were quite long. But that was what I saw when the car had -1 heads. It's difficult to get A SERIES of big tubes with good trajectory under the floor. Here's another pic I stored I think Al made for his B1 valiant.