Hello! I am planning to make an exhaust manifold for hx40 to fit my om603 engine and I have a few questions for you. What flange is the hx40 you use, is it t4? What size of tubing is the best to use? And how is the best way to plumb the pipes together I have seen one that had cyl 1 2 3 connected to ...

Hello! I am planning to make an exhaust manifold for hx40 to fit my 603 engine. Is there anyone who have a drawing of the exhaust flange for an om 603? What flange is the hx40 you use is it t4? What size of tubing is the best to use? And how is the best way to plumb the pipes together I have seen on...