All the assymetric cans are the same whether its is for a 749 Dark or a 999S.The differances are with the front pipes.Deep sump bikes and '05 bikes with the racing style swingarm need differant front pipes.(Deep sump-749R,999S & R)
For example a system for an '03/04 749 will not fit an '05 bike because a differant bend is required around the swingarm.Similary an '04 999S system will not fit an '05 bike.
BTW,a front pipe designed for a deep sump bike will still fit a standard sump bike.(As long as its the same model year!)
Confusin' aint it!?