I buy the bends.
I notice half way through that the long side of the J bend is slightly fatter than the rest of the pipe, my fault for buying the cheap bends. I also couldn't get 45s so that's more work. I already see that the #7 needs to be straightened out at the head.
Now I need to decide if I want to leave the pipes round at the flanges or square them. either way the tubes are bigger than the flanges and those are bigger than the head. I started messing with the mufflers and there is not a tone of room. I think I will have to wrap the whole system from the collector back get them coated.
