Image Item No. Description  2852  Technic Engine Connecting Rod Catalog: Parts: Technic  2850  Technic Engine Cylinder (Undetermined Type) Catalog: Parts: Technic  2850a  Technic Engine Cylinder with Side Slots Catalog: Parts: Technic  3652  Technic Engine Piston Square 2 x 2 Catalog: Parts: Technic  2426c01 (Inv)  Technic Rack Winder Catalog: Parts: Technic