This cam rocker arm assembly is compatible with the following motorcycle models: 125 SX (2019–2020), 200 (2020), 200 XC-W (2013–2016), 250 EXC-F (2017–2019), 250 SX (2017–2020), 250 SX-F (2017–2020), 250 SX-F Factory Edition (2017), 250 XC (2017–2020), 250 XC-F (2017–2020), 250 XC-W (2017–2020), and 390 (2017–2020).Constructed from cast steel, this component is designed for use in motorcycle engine valve train systems.Package includes.