The stock V6 setup is horrible.
When you go duals, make sure it is FULL or "True" duals, NOT with "Y" pipes.
The sound of a Y pipe setup is barely louder than stock and there is probably no performance gain because the whole system is limited to the size of the single pipe between the Ys... just like stock.
My
Pypes setup with Street Pro mufflers is the loudest I've heard on a V6. (97dB at cold idle, interior 87dB at 2200-2500 rpm, exterior at WOT ???? LOUD!)
There is a very deep resonance (old school term) that has made many people mistake my pony for a GT.
The 4 inch tips almost require the use of GT rear bumper cover or other aftermarket cover, they don't look good on a cutout stock bumper.
I have videos up on YouTube (SOHCman).
Just make sure to go FULL duals... you can always unbolt the mufflers if you want to try something else.