Masters of Motors (MOM) the new EngineMasters Challenge (EMC)

you can't use step headers
but if pipemax showed that a step- smaller than 2" --for a ways-- would help
you could sleeve the ID
stuck at home -see what you get
cheers

I like the way you think but no way no how is a small cube engine like this going to like a header any larger than 1 5/8". I do have some room to play with primary lengths and collector design. Oh yeah and **** this virus! J.Rob