I remember mention of someone making a four inch downpipe for the the H2E. I did a couple searchs but couldn't find who it was. If you know who was making them, I'd appreciate the info.
Wheres a good place to find that flange for the outlet.....thinking about making a hood stackOne 90* 4'' SS bend and one 45* long leg SS bend and a flange for the outlet. It is real easy to fit them up and weld them together.
I use 4'' flex from the end of the 45* down to the exhaust piping.