Motorcycle Cylinder Head Gasket compatible with CBR1000RR models from 2006 to 2007 and CB1000R models from 2018 to 2022.This gasket is designed to fit engine assemblies requiring 12251-MEL-D21.It seals the cylinder head to the engine block, helping maintain compression and proper engine function.The gasket is constructed to meet specifications for durability and performance in -temperature environments.Installation requires standard mechanical tools and knowledge of engine systems. This is a non- replacement.Any reference to brand names or models is strictly for compatibility purposes.