I am going with the flowmaster 40 clone, flowmaster lost their patent a few years ago. Haven't changed their design for a long time. I have the same clone on the Trooper, had it on my F150 as well. Sounds pretty much the same and its is barely half the price.

I ordered the manifolds today, should be here next week and I will send them in to get coated. I will post some pics when I get them back.