Progressive Monotube Fork Cartridge Kit For Harley Sportster Forty Eight True high performance and increased comfort is provided with this kit by upgrading the technology your front forks are using. This state-of-the-art monotube fork Kit represents the pinnacle of front end handling. Features: Asymmetrical design places a preload adjuster over a progressive rate spring in one leg and an aluminum bodied, sealed cartridge damper on the other True high performance front suspension is finally available for the HD 49mm front ends High performance specialty components replace the sloppy open bath damping found in stock H-D forks Gas charged monotube fork cartridges and custom tuned fork springs Complete, direct replacement for your stock internal components Improved resistance to front brake dive Improved front end stability Improved cornering Improved bottoming control Made in the USA