I also enjoy the sound....the volume varies with throttle, its very quiet in "normal" driving, but makes some noise at full throttle (but its an awesome noise)

As for obtaining the pipe....you'd probably be best leaving a shop to install it, as it needs to be bent several times around the suspension in back...and that'd be pretty hard on your own. The piece of pipe shouldn't be more than $25-40 at a shop....and maybe $35-40 labor? (took the guy at Lentz that did mine about 20-25 mins from start to finish)

__________________
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'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
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