Right now I have it dual out the back. I am up in the air if I want to dump it right before the rear axle? Dual or dumped?I run no muffler. I would also like to change the factory y-pipe to something more hi-flowing? Any thoughts/suggestions

 

Dump before the axle, and maybe you could upgrade the factory 2.5" y pipe to a 3" but I dont really think it would make a difference in the exhaust tone.

 

I like duals out the back. It is a free world.