1、OE Number: Cylinder kit replace part number are ABAN64LRC, ABANBI, B1005A, 2GU 11311 00 00, 2GU 11321 00 00. Please check the number before ordering. 2、Strong Compatibility: Cylinder piston gasket is fit for Banshee YFZ350 1987‑2006, please confirm whether your model is applicable before buying. 3、Main Function: Provides an efficient seal between the piston and cylinder head, ensuring stable pressure and temperature inside the cylinder and reducing energy loss. 4、High Performance: Increases the compression ratio inside the cylinder by repairing the seal between the piston and cylinder, thus increasing the power output of the engine. 5、Long Durability: Metal construction has good abrasion resistance and is able to withstand the wear and tear of the top of the piston that rotates at high speeds, extending kit life.