Dual Setup? You Bet Your ***!
RII. Yes it is possible to have a dual exhaust setup. I have one. The price of $400 on the otherhand, is not expensive at all. I am suprised Meineke even told u they would do it. They told me no, so I went to my friend and we did it ourselves. The result is amazing. There is a very very limited amount of space though, like your guy said, which makes equalizing the airflow pretty hard. You obviously can just try to make it then same but it might offset the point of an exhaust; which is more power, not sound (heheh, well, maybe not quite). I have a stainless setup that was built using 2.25" tubing from Borla but with 2 40 series Flowmaster mufflers and a custom Y pipe from the cat. It took about a week to do (were fairly lazy) but I am very very glad we did it. With my K&N FIPK, a JET chip, Borla Headers and new underdrive pulleys, we got a very very healthy horsepower and torque gain over a single 2.25" system and a nice gain over a single 2.5" system. But, the real reason? Your right, its the sound. And oh my god. I blow Mustangs away, u cant even hear them. Thing sets off car alarms like nothing. let me know if you need some more advice.