Iridium Spark Plug

The D640-0002 spark plug applies to the following engines: N20, N54*, N55*, S55, N63/N63TU, & S63/S63TU

Additional Information

N20/N54/N55/S55/N63/N63TU/S63/S63TU

• 1 step colder than OEM (N20, S55, N63, S63)
• 152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum
• 2 steps colder than OEM (N55)
• 3 Steps colder than OEM (N54)
• Acceptable for high performance / tuned and most stock* vehicle applications alike
• An excellent match for Dinan ignition coils
• Cooler operating temperature than stock plugs
• Heat range 9 spark plug (Similar: Bosch 3, Brisk 10, Champion 4, Denso 27, and NGK 9)
• Hexagon: 14mm Bi-Hex
• Install Torque: 17 Nm
• Insulator Material: Ceramic
• Lower required supplied voltage
• Made in the EU
• Optimized electrode design for hard to ignite fuels, such as ethanol
• Projected insulator design
• Resists preignition better than stock plugs
• Seat Type: Flat
• Stronger than copper and platinum
• Supplied Gap: 0.5mm
• Terminal Type: Nut
• Thread diameter: 12mm
• Thread reach: 26.5mm

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Reference Information