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Old 11-17-2009, 05:54 PM
freewheeling frank freewheeling frank is offline
Motorized Bicycle Elite Member
Join Date: Mar 2009
Location: ridgway colorado
Posts: 440
Default Re: Looking to make an expansion chamber...

they work. but just punching out the stock mufflers has worked well for me that is drilling holes not only the end caps but internaly ya the get loud no louder than the herd of harleys, bought a tuned from spookytooth, just to tight for my builds barely rubbed the front tire but did increase power, no more than opening the stock muff up the units that are high up against yer leg seem to get better reviews
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