Fits 3-4 HP Briggs & Stratton and Tecumseh vertical shaft engine. Replaces Briggs & Stratton OE #298830, 394569, and others 1/2" exhaust pancake replacement muffler Fits 3-4 HP Briggs & Stratton and Tecumseh vertical shaft engine Replaces Briggs & Stratton OE #298830, 394569, and others Pancake" type, t