On my last 3 Dodge trucks (Ram 5.9, Dak 4.7 and Dak 4.7) I ran 2 1/2 single into a dual chamber 40 series Flowmaster, then dual 2 1/2 straight out the back. Man does it rumble and sound brutal. Not too bad in the cab either, slightly annoying at around 2500 RPM but it always fools people into thinking its tricked out when its all show . Combiined with a K&N air filter it seems to be very slightly better on gas/performance.
I put the aero turbine at2525 on my 05 & removed the rear resonator. Like it, just right at idle, loud at wot & no noise in the cab, had magnaflow on the 03 & had a little more rumble to it miss that sometimes.The at is more quiet on long drives. Makes the boss happy.
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