The ECHO P021002984 Piston Kit is an authentic OEM replacement component designed for a range of ECHO chainsaws and outdoor power equipment. This essential kit typically includes the piston, piston rings, wrist pin, and retaining clips, crucial for maintaining optimal engine compression and performance. It is specifically compatible with ECHO models CS-310, CS-3000, CS-3050, CS-3400, CS-3450, CS-346, and CS-306, ensuring a precise fit and reliable operation to restore the efficiency of your equipment.