Flowmaster 40s vs. 50s
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#2
The 40 is going to be louder than the 50 with a little more cab resonance. I had a 40 on mine (not 04) and ended up getting it swapped for a Delta 50. The 40 had a nice sound but too much cab drone at 60-65 mph. It got a little more than I wanted to listen to all the time. The 50 sounds great at idle, lets you know when you are getting on it and no cab drone...