Extended Life Series and Professional Series™ Briggs & Stratton genuine Platinum Spark Plug is a premium quality plug that provides long life, easy starting, and increased ignitability. This Genuine Briggs & Stratton spark plug provides long life, easy starting, increased ignitability and idle stability. It's exclusively designed for use on: Selected L-Head engines. Extended Life Series Version of 802592S/5095. Replaces CJ8, RCJ8, J19LM, RJ19LM. Briggs & Stratton Genuine Part Designed specifically for our engines and can save on costly repairs while maintaining valuable warranty coverage.