just go into a bike shop and ask...
get a set of end plugs for fat bars or 7/8 alloy bars..
clamps at the other end for 7/8 bars..
yer can buy all the bits on there own...
I find Zeta build the best bark busters..there fittings
lock up real tight...they use bolts/nuts not threaded holes
in soft alloy like a lot do..

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Harley Davidson..
The easyest way to turn gasoline into noise with out the side efect of horse power...