Founded in 1995, China Dongda Power Industry Co., Ltd. is one of the few piston cylinder manufacturer and distributor in China that has patents on the generator, motor, power supply, engine, alternator, diesel and gearmotor design, supply and sale. Our custom piston cylinders has obtained the certifications of ISO9001-2000, GS/TUV, CE, VL, EPA, QHS, SON, CAP and SRS and we have won EPA 2005 Motor Year Certification. Our 30 QC staff carefully performs inspections at every stage of production, from the time we receive raw materials to packaging. Noise, power, and stability are tested to ensure that our engines can endure 580 hours of constant use. We also can design and deliver OEM/ODM samples in one month.

JB Unicorn cylinder head set (Ver. III). Highest machine precision made. provides smooth air nozzle. Improves the FPS!! Compatible with original cylinder. JB Unicorn cylinder head set (Ver. III) Highest machine precision made, provides smooth air nozzle, and improves the FPS!! Compatible with original cylinder. Aftermarket piston and cylinder kit for Husqvarna chainsaws. This kit includes a piston, rings, pin, clips, and cylinder, all for one low price. Cylinder is NiSi plated. We recommend purchasing our ring clamp set #10429 and gasket set #503 47 37 01 when assembling this kit. Fits the following models: Husqvarna 395Replaces OEM part # 503 99 39 71. Teflon Coated. aluminum construction. Includes piston head bearing. Tests conclude velocity increase by about 10 FPS. Will fit Version II gearbox. Teflon Coated, aluminum construction. Includes piston head bearing. Tests conclude velocity increase by about 10 FPS. Will fit Version II gearbox

JB Unicorn cylinder head set (Ver. III). Highest machine precision made. provides smooth air nozzle. Improves the FPS!! Compatible with original cylinder. JB Unicorn cylinder head set (Ver. III) Highest machine precision made, provides smooth air nozzle, and improves the FPS!! Compatible with original cylinder. Aftermarket piston and cylinder kit for Husqvarna chainsaws. This kit includes a piston, rings, pin, clips, and cylinder, all for one low price. Cylinder is NiSi plated. We recommend purchasing our ring clamp set #10429 and gasket set #503 47 37 01 when assembling this kit. Fits the following models: Husqvarna 395Replaces OEM part # 503 99 39 71. Teflon Coated. aluminum construction. Includes piston head bearing. Tests conclude velocity increase by about 10 FPS. Will fit Version II gearbox. Teflon Coated, aluminum construction. Includes piston head bearing. Tests conclude velocity increase by about 10 FPS. Will fit Version II gearbox