Every portion of a header has a reason... pulse lengths
(or wave lengths).. things need to happen at a timed
point otherwise you end up with things crashing together..
I TRY to get 1 cyl volume from the valve to the tangent
of the first bend.. the first step is at a point
for a reason.. thats to continue the flow in one direction
and the same for the next step.. the tube sizes are
for the velocity and the size is part of where the
step will be... but understand that if the tubes
arent equal length then it MAY not help at all..
when we build a header its with the idea that the tubes
will be equal.. and at a certain length.. this length
is part of the exhaust timing as is the steps
