The D640-0001 spark plug applies to the following engines: Gen 1 B48, Gen 1 & 2 B58 engines as well as the S58.

• 1 step colder than OEM (Gen 1 B48, Gen 1/2 B58, & S58)
• 152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum
• Acceptable for high performance / tuned and 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: Cup
• Thread diameter: 12mm
• Thread reach: 26.5mm