Originally Posted by raps101

Hey guys, i'm number 169 on the list. WooHoo! I'm trying to decide between the 12" and the 18". I want the exhaust to be much deeper and somewhat louder than the stock exhaust, yet i don't want it to be overwhelming in the cabin, but its hard to figure out the how much difference there is from stock to 18 and from 18 to 12. I wont be changing the headers or cats or intakes. Can anyone provide some input?