DENSO 5344

Features & Benefits:

• LIFESPAN / DURABILITY | Iridium alloy is 6X harder and 8X stronger than Platinum
• Iridium with Rhodium Center Electrode -- has the highest concentration of Iridium of any spark plug and outperforms in the most severe engine temperatures, resisting oxidation and voltage wear for over 100,000 miles.
• Patented 360-Degree Laser Welding -- creates the highest quality bond for structural support of the center electrode.
• PERFORMANCE / IGNITABILITY ①
• 0.4 mm Fine Wire Iridium Center Electrode -- achieves higher ignitability and requires lower spark voltage to enable high-response driving with fewer misfires. As a result, acceleration improves in comparison with normal plugs.
• Tapered Cut Ground Electrode -- improves firing performance by reducing quenching.
• EFFICIENCY / FUEL ECONOMY
• Patented U-Groove ② Ground Electrode -- enables complete combustion by allowing the spark to fill the gap created by the U shape. The ball of fire created in the U-Groove develops a larger and hotter flash front that virtually eliminates excessive fouling and erratic starts caused by poor fuel mixtures.

Which DENSO Spark Plug Is Right For You?

Material / Series	Lifespan / Durability	Performance / Ignitability	Efficiency / Fuel Economy
Copper / Nickel U-Groove	★	★	★
Platinum Twin Tip	★★★★	★★	★★
Double Platinum	★★★★★	★★	★★
Iridium Twin Tip	★★★★★★	★★★★	★★★
Iridium Power	★★★★	★★★★★	★★★
Iridium Long Life	★★★★★★	★★★★	★★

Videos

How To Replace DENSO Spark Plugs

Additional Resources

More Information about Iridium Power Features and Structure

Warranty Information:No Warranty

CAPA Certified or NSF Certified parts bear the seal of independent, third party organizations guaranteeing fitment and quality equal to original equipment. These parts may be required if your insurance company is paying for the repair.