Transform your existing RockShox Pike, Lyrik or Yari suspension fork into the ultimate trail fork. The ACS3 coil conversion kit combines small bump sensitivity, traction, and mid stroke support of a coil with the big hit performance of an air spring. By using coil springs, you can eliminate the constant maintenance required to keep your fork running optimally!Fits 2014-2017 RockShox Boost 27.5 Pike/2018-Current 27.5 and 29 PikeIncludes Air Bump Stop, Lower Plunger Rod, retaining ring and travel indicatorReduced friction for smoother overall fork performanceAir Bump Stop cartridge technology to control the bigger hits towards the end of the travel PUSH Industries ACS3 Coil Component Kit RockShox Coil Springs & Parts UPC: 840031600080