Update for 99-17 Heritage Models
A better solution is to get Drag Specialties PN: 2020-0593
This will add bullet 1156 signals to the back of a heritage and look much better.
https://www.denniskirk.com/drag-specialties/bullet-style-turn-signal-kit-2020-0593.p2001472.prd/2001472.sku?cid=17917642306
On many heritage models the rear signal bar is too wide and the signals will not clear the saddlebags. Bikes equipped with HD PN 68510-74C will most likely have this issue:
The easiest solution is to purchase the shortened turn signal bracket from drag specialties DS-280218:
https://www.denniskirk.com/drag-specialties/short-turn-signal-mounting-bracket-ds-280218.ph21266.prd/H21266.sku
Most of the bikes with tombstone lights and bullet style signals will work without any modification:
