I have homemade decat, Goldies have 1 3/4" perforated tube front to back, so straight through really but baffles can be fitted.
Ran it today, it is LOUD, harley loud, I really like it, lots will not as it is antisocial.
BearJu also sent pm to which I replied ~
'Sorry did not take any pics, had to take out threaded insert in end of handlebar to fit indicator base into,
H/bars are already drilled for wires to come out, connected to wires from stock indicators.'
I have T120 bars on mine but fitting to blobber bars should be same, led's light both forward & to the rear, with 7 watt each they are nice & bright, good quality just a little pricey, but worth it.