i was fixing to start making my adapter to go from the stock exhaust manifold to the hx 55, is there any majors i need to consider. i was going to make it from 1/2 steel and about 1.5"s long. just two flanges with a transition piece between and i was planning on keeping the center divider. does this sound about right? mike

 

Sounds like the spacer I use for my wastegate.....kind of old school now but you will need it to make the 55 work, Mine uses TO3 Flanges and 10 guage steel as the spacer.

Jim