The Namura FX-70090R Piston Ring Set is an application-specific engine component for Gas Gas & KTM. It is designed for the verified year, make and model combinations listed below. Key Features Application-specific ring set designed for the listed piston and bore size Compression-ring materials and coatings are selected for wear resistance and sealing Confirm piston compatibility and any oversize specification before ordering Manufacturer: NamuraPart Number: FX-70090R Vehicle Fitment Year Make Model 2021-2023 Gas Gas EX 250F 2021-2023 Gas Gas MC 250F 2016-2022 KTM 250 SX-F 2015 KTM 250SX-F FACTORY ED. Fitment note: Match the year, make, model and any listed specifications to your machine before ordering. Professional installation is recommended for internal engine components. Shipping & Returns Most orders process within 1 business day. 30-day returns on new, unused items.