Cylinder-piston repair kit for 23 cm³ or 26 cm³ Losi 5ive-T engine. The set includes the following parts:Cylinderpistonpiston ringcylinder foot gasketpiston pin clipPlease note:It is recommended to use a gasket sealer with every gasket on an engine. This gives better sealing anda longer lasting gasket. We also recommend:y0804 HT-flange sealer 518 y0994 Marston sealery0807 MD-Sil RTV silicone sealer