105 Factory kit with more displacement (105 instead of 85). Significantly more torque. Significantly more performance. Fits on 85 SX 17/14 2018, 85 SX 19/16 2018, 85 SX 17/14 2019, 85 SX 19/16 2019, 85 SX 17/14 2020, 85 SX 19/16 2020, 85 SX 17/14 2021, 85 SX 19/16 2021, 85 SX 17/14 2022, 85 SX 19/16 2022, 85 SX 17/14 2023, 85 SX 19/16 2023, 85 SX 17/14 2024, 85 SX 19/16 2024,