Can anyone suggest a muffler that flows better than stock but will not be loud on a 3.9L Ram?

 

Dynomax

 

I had a dynomax on there before this flowmaster (which is too loud). I replaced it because after 2 months it cracked where the inlet meets the body of the muffler.

 

I'm a big fan of magnaflow. Stainless steel construction and you can buy different length
mufflers to suit your sound needs. I purchased both of mine from summitracing.

 

I agree on the magnaflow. It gives you a nice tone, without any crackling. Provides a very consistent deep consistent tone, it's quite smooth. I personally didn't like how smooth it was, but if your after something that isn't going to be overbearing, I think a magnaflow muffler is a great option.