Just to give you an idea of what the world famous Dougs Muffler charged me for true duals (2 1/4") and the "mystery mod"...$350.00. I got the rest of the parts from Stazi, Magnaflow everything (SS Magnaflow race mufflers w/4" tips a part of the mufflers, Magnaflow resonaters, Magnaflow X-pipe and the flex pipes) and that was another $525.00. Add in a set of MIL eliminators from Dallas Mustang and I spent about $950.00
To be honest with you though, if I had to do it again, I'd just go with some mufflers, probably some Brullens because they sound great, not as raspy as my old setup and alot deeper sounding