True high performance front suspension is finally available for the HD Dyna line. Progressive Suspension has gone back to the drawing board and created a state of the art Fork Cartridge Kit designed to outperform everything on the market. Their new asymmetrical layout places a preload adjuster over a progressive rate spring in one leg and an aluminum bodied, sealed cartridge damper on the other. The result is superior damping and ride control combined with tunable preload and a new benchmark for high performance suspension for the Dyna platform. Monotube cartridge style damping improves ride comfort, resistance to front brake dive as well as improving front end stability, cornering and bottoming control. No mods are required and install is relatively simple. Each kit includes components for stock as well as 1” lowered version for 2006 – 2014 FXDB, FXDC, FXDL & FXDWG Applications. Check it out on their website, or contact your local Progressive Suspension dealer for more information.