Progressive Suspension PS-31-2515 Monotube Fork Cartridge Kit for Harley-Davidson Sportster Forty-Eight 10-15/Nightster 07-12/883 Iron 09-15/883 Low 07-10Description for Progressive Suspension Monotube Fork Cartridge Kit 31 2515 Converts dual damper rod and damper rod cartridge forks (02 05 models) to high performance cartridge forks A pair of high performance, gas charged mono tube fork cartridges are included Resistance to front brake dive, front end stability, cornering and bottoming control are improved Modification of forks is not required Included Items: (2) Monotube assemblies (2) Short top out