The R&D Kawasaki SX-R Pro Series Twin Fin Racing Billet Sponson Kit works as an optional and removable additional stabilizer blade that mounts flush with the hull, and to the inside of the backing plate. The Twin Blade concept will add a substantial additional amount of rear end grip and straight line stability necessary for aggressive limited through 200 plus H.P. engine packages! The Pro Series Twin Fin Kit was tested prior to the 2017 World Championships and used in racing competition with some the Worlds Fastest Pros. The R&D Twin Fin is also a great addition for the recreational rider who wants the ultimate sponson setup available for the SX-R. Pt. # 0121-81504 SX-R Optional Blade Kit (Will adapt to pre-existing RACE sponson kits) with minor machining modifications. Pt. # 121-81503 SX-R Race Twin Fin Complete Kit
