A-B1843951-AI PISTON ASSEMBLYOne New Aftermarket Replacement Piston Assembly Fits Briggs and Stratton (B&S) Vanguard OHV V Twin Engines This aftermarket replacement piston assembly is designed Fits Briggs and Stratton (B&S) Vanguard OHV V Twin small engines. The piston assembly fits into the cylinder and links to the connecting rod, separating the combustion chamber from the crankcase. It moves up and down as cylinder pressure changes between combustion sequences, driving the