[JBones81]

Please bear with me here on another exhaust question thread.

I'm looking at the AWE touring cat-back setup. However, when I go to buy it, it offers me resonated or non-resonated. What is the difference between those 2?

Also, it asks if I need the "valve simulators." What are those? Is that to keep NPP, or something else?

The system is pretty pricey at $2045 on phastek and awe's sites. Is there a better place to order, or deals going on right now?