In a turbo app it don't matter if their standing straight up it comes down to where u need it to spool and the size of the turbo exh housing. This is why rear mount turbos work all that piping going to the back of the car slows the spool time but they adj with smaller housings that spool faster. So in a app like this. U need a larger exh housing cause the turbo is closer w more velocity and temp. Very basic exp.