We actually did... that was the beginning of the thread, Shawn. It was the preface to this whole discussion. How hard would it really be to have a straight exhaust pipe?
I venture to say that given the head re-shaping that would be necessary to have a truly straight exhaust flow (or anything close to it), the engine would be laying nearly flat, which was part of the design consideration for the original intent. From there, it's just a matter of piping straight-ness from engine to rear of car. Jeez, that's hard.
You are vehemently opposed to the idea of a straight exhaust, aren't you?
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"