Features:

• Compatible with all overhead valve engines
• Better engine performance
• Resistance to carbon build-up and pre-ignition
• Better emissions
• Fewer exhaust fumes
• NGK's patented triple-gasket sealing process eliminates combustion leakage
• Faster starting
• Smoother running
• Old Part Numbers: 491055E and 594056

Briggs & Stratton 992304 is an alternate replacement spark plug for these:

• Brisk 1326
• Brisk DR17YC
• NGK 6130
• NGK BCPR5ES
• NGK stk 6130
• Champion RC12YC