A-B1591751-AI VALVE-INTAKEOne New Aftermarket Replacement Intake Valve Fits Briggs & Fits Stratton Engines This aftermarket replacement intake valve Fits Briggs & Fits Stratton (B&S) vertical shaft engines and is used in the cylinder head assembly to regulate the flow of the air fuel mixture into the combustion chamber. A properly functioning intake valve is essential for efficient combustion, consistent power output, and long engine life in lawn mowers, lawn tractors, and