Enhanced piston pin oiling slots, radial boss machining, and annular grooves for improved wrist pin lubrication Lightweight piston with a tight piston wall clearance for a quieter running engine Skirt coated for reduced friction and improved break in performance Ring land treatment for improved ring seal and oil control Double bridged forging design where noted Kit includes piston, rings, wrist pin and pin locks - KTM 450 SX-F (2018, 2014, 2020, 2022, 2013, 2015, 2021, 2016, 2019, 2017); KTM 450 SX-F FE (2015, 2013, 2014, 2016); KTM 450 SMR (2013, 2014); KTM 450 XC-F (2020, 2022, 2014, 2016, 2017, 2018, 2019, 2015, 2021); Husqvarna FC 450 (2019, 2021, 2022, 2014, 2016, 2020, 2015, 2017, 2018); Husqvarna FC 450 Rockstar Edition (2021, 2019, 2020, 2018, 2022); Husqvarna FX 450 (2019, 2020, 2018, 2017); Husqvarna FS 450 (2017, 2021, 2018, 2019, 2020); Gas Gas MC 450F (2021, 2023, 2022); Gas Gas EX 450F (2021, 2022, 2023); Gas Gas MC 450F Troy Lee Designs (2022)