Manufactured by JUN and cooperated with Wossner in Germany, This W series is an excellent product in the cost performance. Only for B16B or B18C Engine. This is a forged piston. Form is for convex, Weight 368g, Pin diam 21mm, Capacity 9.1, Pin height 30.1mm. Piston rings, Piston pins, Snap rings are included. Choose the Bore size 81.0, 81.5 or 82.0mm.