flowmasters can often sounds tinny. i love the sound of magnaflows, very deep and throaty.
I have 40 series on mine. Sounds good to me
I got the super 40 series on mine and I love the sound, I ran 2.5" straight off the header to the rear of the cab and it sounds deep as hell
im runnin a super 40 on my 305. 2.5 from the manifold back to the flormaster, then out the truck. has a really nice sound to it.