The heads (103), pistons, crank, etc... are all from the HD SE103 kit (the same one they put on the CVO), part number 29842-03.
From HD:
Screamin' Eagle® 103 Cubic Inch Stage I Kit for EFI Models
Bring your Twin Cam Touring motorcycle up to the same displacement and power output as the CVO Screamin' Eagle® models - a whopping 1690cc. This 50-state street legal kit combines all the proven components of the Screamin' Eagle® models - the 4-3/8" stroker flywheel assembly, 3-7/8" big-bore cast pistons, big bore cylinders, SE-253 camshafts, cylinder heads, air cleaner assembly and cover insert. The black highlighted Screamin' Eagle® 103 cylinder heads and cast piston combination offer a 9:1 compression ratio for easy starting. The cylinder heads also prominently feature the "Screamin' Eagle® 103" script. Kit includes all required gaskets (except primary cover) and hardware to complete the installation. Street legal when used with stock mufflers on '03 models.
Black
Fits '03 EFI Touring models. Installation requires ECM Calibration (not included). Street Legal when used with stock mufflers.
Thanks!
Randy