side dump pipes - advantages/disadvantages/legalities?

ok guys, the engine is running, still haveing fuel shortage problems (think it's to do with the stupid pollution system) but i have ben having a look at the stupid exhaust recently and come up with an interesting solution. at the moment, the exhaust comes off the engine and heads toward the front of the car (using the original subi headers). now with the last engine it simply made a tight turn into a muffler, then back out the back. now the sharpness of the turn, the distance from muffler to tip and the height of the exhaust to clear the engine transmission and suspension seems inneficient and awkward. what i propose to do instead is to split the exhaust when it gets about 1/2 way up the bus, runtwo very wide raduis 1/2 circles to get the exhaust running in the right direction again, then fit mufflers up into the gap bewteen chassis rail and edge of body and run dual dump pipes out infront of the rear wheels. just interested in some feedback on the concept, possibel advantages/disadvantages and any legal issues
thanks

law states that the end of the exaust has to finish 500mm past the last opening window door,,,, so it will have to come out the rear end..... whats goen on with the fuel system?

Wow, are you sure it's 500mm?
How do the Shelby Cobra and Lotus 7's replicas get away with their side pipes then?

The QLD Code of Practice Vehicle Inspection Guidelines states "...The exhaust outlet must extend at least 40mm beyond the furthermost outboard or rearmost joint of the floor pan which is not continuously welded or permanently sealed which could permit direct access of exhaust gases to the passenger compartment, but not beyond the perimeter of the vehicle when viewed in plan; the exhaust outlet, if to the side of the vehicle, must discharge to the right hand side of the vehicle and downwards at an angle of not less than 15 degrees and not more than 45 degrees..."
Reference available from here http://www.transport.qld.gov.au/qt/driver.nsf/index/codeofpracticeais

well as long as vic is similar to qld i am fine. i have no rear opening windows and i can have the pipe exiting as much as 20 - 30cm behind the sliding door without an issue. surely they wouldnt count the rear hatch? the gasses would be so far infront of it that they would have dissapated before they got near?