The Brian Crower valve spring seats for 2016+ Yamaha YXZ and Sidewinder applications, and 2018+ Arctic Cat XX models, supply the spring seat components called out in the description. These spring seats are offered for those specific model groups to support valve-train reassembly and service when replacing or refurbishing the valve components.
Brian Crower Spring Seats - 2016+ Yamaha YXZ / Sidewinder / 2018+ Arctic Cat XX