I have a 02 ram 2500 4x4 5.9 gas engineand am lookin at getting exhaust for it but dont know what kind of muffler i want to get I am gonna get a catback system with 2.25" pipes and stainless tips but havent decided on a muffler. Looking at magnaflow, flowmaster 40, super 40 and the new super 44, cherrybomb and dyno max. any help with the subject would be appreciated. I want a muffler with a great lowrumble and one that gives me a little extra HP.