Dual Exhaust System Recommendations ?

In my experience, any kinda crossover takes away some of the "crispness" of the exhaust note. On a street car, you're never gonna feel the power difference if there is one. It's just not enough IMO to worry about and to me, takes away from the exhaust note, instead of adding to it. I think a lotta people get hung up on sheer marketing. I can throw a turd in the gas tank and show some before and after dyno numbers I made up and I bet I would sell at least one turd.