I am going to add more H's to my system. I was thinking of starting at 1 5/8 and go up to 3 1/2 inch in 1/8 increments. This should cover all the power curves. With a system like this I shouldn't need any other power adders.
The guys on Truck-U probably sell this system. But I will make my own to save some money.
Aluminum H's would will be used for a weight saving. They will be tig welded to the steel pipes using our special alloy wire.
I will also connect all H's with H's to equalize the equalization. It should sound like a roaring church organ and run like the devil when completed