This Briggs Stratton Oil Fill Cap (OEM Replacement Part# 281658S) is a genuine Briggs Stratton replacement part designed to help keep your outdoor power equipment running at peak performance. Only Briggs Stratton genuine parts are specially designed to exact OEM standards, manufactured and tested to help deliver optimum performance in Briggs Stratton engines. Not only are Briggs Stratton genuine parts guaranteed to fit, but using them ensures that the Briggs Stratton engine they are installed on complies with applicable (EPA) emission regulations.