Manufactured by JUN and cooperated with Wossner in Germany, This W series is an excellent product in the cost performance. Only for K20A Engine. This is a forged piston. Form is for convex, Weight 368g, Pin diam 22mm, Capacity-9.0, Pin height 30.0mm. Piston rings, Piston pins, Snap rings are included. Choose the Bore size 86.0, 86.5 or 87.0mm.