For Husqvarna 340 345 346XP 350 351 353 Replace OEM for 503869971 , 503 89 44-01 , 503 86 25-01 Package Contents:1 x Cylinder Piston Kit , 1 x Gasket Set , 1 x Decompression Valve , 1 x Fuel Filter w/ Hose , 1 x Spark Plug , 1 x Needle Bearing