Originally Posted by BigOrange
...oh yeah.... like 916Timmy said, start out with an 18" Magnaflow for sure if that's the sound you like. They also have a 22" & 24" as well. I believe the case length on my Flowmaster is 17". Remember, the bigger & longer the muffler case is, the quieter it will be
Check this chart out to help you select, and I chose Magnaflow for the straight through design. FLowmaster does make moke backpressure which helps keep all the tq in tact, but it won't make any gains anywhere. Just sound, and not sure how true that is...I hear the 50 HD was made specifically for the Hemi motor.