Just to make things simpler....
Part numbers for 05+ LGT clutches and flywheels are as following:
SB5-HDMM (HD Street Disk organic clutch)
600480 (Streetlite flywheel)
15804 (Stg 1 organic clutch)
FF502 (light flywheel... don't usually stock it though as the ACT are much more popular)