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Alot of L4 engines have the exhaust come out the front of the block and then rotate underneath towards the rear.
I'm also talking not just about the pipes coming from the block itself, I'm including the block proper in the discussion. If the exhaust traveled at an angle 20 degrees below the cams(just enough to avoid them) and then merged the total number of degrees of rotation on all axes by the exhaust gases on the outside cylinders would at most be 20 down 20 up and then ~30 for 4-2-1. Before mine or yours even leaves the block its already been rotated 90 degrees, then mine gets rotated an additional 180 to get it going backwards and then a few degrees here and there to get 4-2-1.
Now Frank I don't know that it will provide any advantages thats why I am asking. What I do know is its harder to push anything through a bent tube over a straight one(assuming the bend does not take advantage of gravity.)
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