hey guys im between the stillen true dual and the APS 2.5 inch exhaust. Im just wondering what is the diameter of the Stillen and which of the systems is louder. Also i am looking into getting a vortech SC in the future.

 

I originally was set on getting the stillen true dual for my 07, but upon further researching i found that it weighs a decent amount more than the stock exhaust which made me hesitant. I know they claim a 16hp gain but i find that a little hard to believe. Personally i don't like the sound of the APS but that is a personal preference. A lot of guys on hear like the HKS. I ended up getting the Blitz Nur-spec and really love it. But since you are going FI getting a true dual setup would be the way to go.