This Genuine Briggs & Stratton Extended Life Series™ and Professional Series™ Platinum Spark Plug provides long life, easy starting, increased ignitability and idle stability for selected OHV engines. Replaces RC14YC and RC12YC. Extended Life Series™ Version of 496018S/5092. Easy-starting factory original specifications. Briggs & Stratton Genuine Part Designed specifically for our engines and can save on costly repairs while maintaining valuable warranty coverage.