Why can't they just weld pipe to the flange, even at an angle, to get from point A to point B as straight as possible?
I guess I don't understand why some of the shapes seems more elaborate then needed. How much of this is done for other reasons? Perhaps audio tone? Back pressure?
In theory, couldn''t the exhaust header start w/ 4 pipes into a funnel shape, tapering down to one pipe? Might not look good, just wondering why some pipes do big loops, other pipes don't. Is there a science to it?
BTW, I am referring to non-turbo setups.