Quieter exhaust than the dmc alien

I don't think you'll have luck with any other exhausts. Your best bet would be to run it a gear higher than needed so you can keep your RPMs down.
 
Taken from a post by TechBlaster in 2009...

Stock pipe is around 84-89, depending on year, etc.
As quoted Toomey is up around 100-104. (one of the loudest)

The only performance exhaust, worth using, that will fall safely into the 96 category, and still give you great performance, will be the FMF Fatty/Powercore 2 setup, 95 decibels.

I happen to have a near perfect full FMF setup, for sale, if you are interested, let me know...