Really...does a u-turn in an exhaust pipe cause resistance in air flow?

Dr.Gas make that type piping, expensive tho. http://drgas.info/

The bends are available in various oval sizes, bends, and transitions from round to oval. Looks like you would have enough room for that type side exit.

 

Intresting and nice pipes.. Some of the welds look kinda rough on the mufflers. Maybe hand welded not machine.. I am curious how those would sound.
I am thinking that regardless of the exhaust system setup we have, most may sound different as not everyone has the exact motor specs and exhaust.. That makes it hard for me to think I could try someones choice of muffler cause my collectors and bends may differ, and the motor. So if I took my muffler and put it on another car, it would sound different.. Adding a box makes it even more unique also.
In all my years of having exhaust work done and mufflers put on, I end up with the sound it makes and no way to change it without buying a different one and trying it out.. which does not happen till the muffler is needing replace.