Dinan B48/B58/S58 Iridium Spark Plug - Heat Range 9 - 12mm x 26.5mm x 14mm (Flat) - SINGLE (dnnD640-0001)

This is the Dinan B48/B58/S58 Iridium Spark Plug - Heat Range 9 - 12mm x 26.5mm x 14mm (Flat) - SINGLE. Part dnnD640-0001. Ignition parts (coils, plugs and wires) deliver a strong, consistent spark.

Dinan Iridium Spark Plugs are an excellent upgrade for tuned, and even stock engines. Our spark plugs are made from Iridium - one of the strongest materials available. They last longer than other materials with higher melting points, run cooler, resist preignition, and even require less voltage to produce a strong spark. The iridium electrode with its copper core is harder and stronger than other materials, can dissipate heat more easily, and is better protected from melting, cracking, and other limitations found with standard plugs.

Features and benefits

• Heat range 9 spark plug (Similar: Bosch 3, Brisk 10, Champion 4, Denso 27, and NGK 9)
• 152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum
• Stronger than copper and platinum
• Acceptable for high performance / tuned and stock vehicle applications alike
• Projected insulator design
• Lower required supplied voltage
• Cooler operating temperature than stock plugs
• Optimized electrode design for hard to ignite fuels, such as ethanol
• Resists preignition better than stock plugs
• An excellent match for Dinan ignition coils

Product details

• Part type: Ignition
• Brand: Dinan
• Center Electrode Core Material: Copper
• Center Electrode Projection: Short Projection
• Center Electrode Tip Material: Iridium
• Electrical Terminal Type: Cup
• Grade Type: Performance
• Hex Size: 14
• Hex Type: Bi-Hex
• Indexed: No
• Insulator Material: Ceramic
• Reach: 26.5
• Seat Type: Flat
• Thread Diameter: 12
• Dinan part number: dnnD640-0001

Fitment

• Vehicle: BMW M2 (G87), BMW M3 (G80), BMW M4 (G82), Toyota Supra (Mk5)
• Years and trims on file: 2023-2026 BMW M2 Base; 2021-2026 BMW M3 Base; 2021-2026 BMW M3 Competition; 2022-2026 BMW M3 Competition xDrive; 2021-2026 BMW M4 Base; 2021-2026 BMW M4 Competition; 2022-2026 BMW M4 Competition xDrive; 2023 BMW M4 CSL; 2021-2022 Toyota GR Supra A91 Edition; 2021-2024 Toyota GR Supra Base; 2020-2026 Toyota GR Supra Base; 2020-2026 Toyota GR Supra Premium
• Application listing: Dinan B48/B58/S58 Iridium Spark Plug - Heat Range 9 - 12mm x 26.5mm x 14mm (Flat) - SINGLE
• Check the vehicle, model years, engine and trim above against your car before ordering. Not sure? Ask us and we will check it against your VIN.

Shipping & returns

• Orders are processed within 1–3 business days; standard delivery is 3–7 business days within the United States.
• Dinan parts are supplied through our distributor. We confirm availability and lead time with you after you order.
• We currently ship within the U.S. only. See our Shipping Policy.
• 30-day returns on unused parts in original packaging — see our Return Policy.

Installation at Team ANBD

Team ANBD is a performance shop in Andover, New Jersey. We can align or corner-balance the car, and prep track cars. Book an appointment or ask us about installation and fitment before you order.