DENSO 3297 Iridium Long Life Spark Plug

The DENSO 3297 (also known as SK20R11) is an OE-quality iridium long life spark plug engineered for superior performance and extended service life. This premium spark plug features a 90% iridium alloy center electrode and platinum ground strap, delivering exceptional durability and reliable ignition across a wide range of operating conditions.

Key Features:

• Iridium alloy center electrode is 6x harder and 8x stronger than platinum for extended longevity
• Platinum chip ground electrode tip design for enhanced wear resistance
• DENSO patented 360-degree laser welding process ensures exceptional bond strength
• Iridium-rhodium alloy formula with melting point over 4,000 degrees Fahrenheit
• Five-rib insulator design reduces flashover and minimizes voltage loss
• 0.044" spark plug gap for optimal ignition performance
• 16mm hex size for easy installation
• Copper core center electrode for superior heat dissipation
• 100% pre-fired to ensure reliable operation
• Manufactured to OEM service interval specifications

DENSO's advanced iridium technology virtually eliminates erratic starts caused by poor fuel mixtures and excessive soot buildup. The unique ground electrode design generates a larger spark nucleus at the point of ignition, ensuring consistent combustion and improved engine performance. Backed by DENSO's ISO9000 certified manufacturing processes and decades of OE expertise, this spark plug delivers the quality and reliability you expect from a world-leading ignition components manufacturer.