A-B1846819-AI MUFFLEROne New Aftermarket Replacement Muffler Fits Briggs & Fits Stratton Vanguard Big Block Engines This aftermarket replacement muffler Fits Briggs & Fits Stratton (B&S) Vanguard Big Block V Twin engines, including both EFI and carbureted versions. The muffler routes exhaust from the right side of the engine (oil filter side) and is designed for horizontal shaft configurations. A worn or damaged muffler can increase exhaust noise, reduce engine