The 2003 Harley Heritage Springer would fall into the Softail, Dyna, and V-Rod category as far as the Bike Bars go so you would need model # BWMC2302.
Specs on this model are:
Fits frame tube diameters between 1-1/4" - 1-3/8"
Fits frame width between 10" - 14" view full answer...