After doing my home werk and input from the board I effortlessly put on a set of Khrome werks 3 HP.
Basically they are plug n play and WOW what a dandy rumble without being obnoxious. I am deeply in love with my RSTD ... there is nothing like having a 4cyl sounds so fine with these harmonics and the tranny whine is muted.
PS I am going to get an air horn and will be selling my mint new in box pre catalytic road king left/right slip
on with chrome attachments
MAX
:dancefool: