Has anyone got dual exhaust on their 09 yet. Im looking at getting true duals vice the one in two out system by flowmaster. What your thoughts.

 

Designing an exhaust system is tricky.
The stock design is not optimal for performance. Its optimal to meet emmisions and sound.
Adding duals definintly would not hurt a hemi 5.7.
Need to do the math to get what you want without being disspointed.

Lets say you add just high flow cats and a high flow muffler.
It will be louder. Typically you will see; or feel; your peak hp reached futher up the RPM range. Loose some low end.

Way to complicated to explain.
http://www.burnsstainless.com/TechAr...ry/theory.html