High-performance damper with dual springs. Main spring coil absorbs big hits and prevents bottoming, while the secondary coil smooths out minor road imperfections. Provide a plush ride that's not afraid to play rough. May require modification to exhaust brackets to open up clearance for belt. Before purchasing or installing shocks that are different than OEM length, confirm that wheel travel can be altered without causing clearance issues, such as swingarm/axle to exhaust contact and chain/belt guard or tire contact..