IMO, 'true duals' in 3rd & 4th gen street cars (ie not race cars or super crazy hp setups) is just a 'my nuts are bigger than your nuts' thing. I question if half the ones in that thread help or hurt. And dumps are track only, IMO.
Look at this mess. (you probably need to log in to see it)
http://www.thirdgen.org/techboard/at...-exh-006.1.jpg
Off topic, would you get under this car?
<-- needs rear tires