My H-pipe is for Sell
as far as cutting the pipes and then welding from there out. my buddy did that and it sounded like a Ricer. He had 2 chamber flows with it. Also if you do that you will only have 2.25 inch instead of 2.5 inch. You will gain more hp from the 2.5, but if you go up to 3 inch you lose alot of torque.
I have heard of many headers leaking before. Best bet if you do get them get the Stage * locking header bolts.
Best of luck.