I have the 50 HD and I love it...I can turn some heads when I give it some gas. I think it has a powerful, deep sound around 2000-2500 rpms but it is quiet at very low and high rpms.

 

I've got the 50 series on my truck. I love it. It gets a little loud over 70 mph for extended periods of time, but that's why you have a volume control on the radio...

 

I put the Flowmaster Super 40s on mine. Sounds deeper than the regular 40 series. Go to Flowmasters website and where you can hear each muffler and click on the 40 series and Super 40 at the same time and you can hear the difference. Not too much drone on the inside. My friend has an '03 Harley F-150 with the regular 40s and he LOVES my Super 40s. I would post the sound but don't know how.

 

loud, and deep. have a muffler shop make u a 2.5 inch cat-back...manderel bent if possible. ten throw on a dynomax race bullet for the muffler. this will be loud, and deep. also the hooker aero chamber sounds nice. its up to you tho. www.magnaflow.com has some sounds of hemi's with their exhaust. i just personally dont like flowmaster's. yeah, they sound good, but others perform better, and sound better in my opinion. also, everyone has flowmasters. i like being different. for deep tho, go with a packed muffler. a chambered will get u a more tinny exhaust note.