Dinan B48/B58/S58 Iridium Spark Plug - Heat Range 9 - Premium Performance Replacement

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. B48/B58/S58 Always check sizes, gap, and heat range specs before installing. Installation of the wrong length plug can cause damage to the engine. You must verify this before installing the plug.

• 152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum
• Heat range 9 spark plug (Similar: Bosch 3, Brisk 10, Champion 4, Denso 27, and NGK 9)
• Acceptable for high performance / tuned and stock vehicle applications alike
• Optimized electrode design for hard to ignite fuels, such as ethanol
• 1 step colder than OEM (Gen 1 B48, Gen 1/2 B58, & S58)
• Cooler operating temperature than stock plugs
• Resists preignition better than stock plugs
• An excellent match for Dinan ignition coils
• Stronger than copper and platinum
• Lower required supplied voltage
• Insulator Material: Ceramic
• Projected insulator design
• Thread diameter: 12mm
• Install Torque: 17 Nm
• Thread reach: 26.5mm
• Hexagon: 14mm Bi-Hex
• Supplied Gap: 0.5mm
• Terminal Type: Cup
• Seat Type: Flat
• Made in the EU

The Dinan B48/B58/S58 Iridium Spark Plug is designed to deliver superior ignition performance for both tuned and stock engines. Crafted from iridium, one of the strongest materials available for spark plugs, it offers enhanced durability, higher melting points, and improved heat dissipation. This results in longer service life, cooler operation, and resistance to preignition, making it an excellent upgrade for high-performance vehicles.
Designed with an optimized electrode and a ceramic insulator, this spark plug provides a reliable spark even with hard-to-ignite fuels like ethanol. Its 1 step colder heat range compared to OEM plugs helps prevent overheating and preignition, especially important in tuned engines or those subjected to high stress. The plug’s construction includes a copper core for better heat conduction, while the iridium electrode ensures stronger, more consistent sparks with less voltage required for operation.
Installation specifications include a 12mm thread diameter, 26.5mm thread reach, and a 14mm Bi-Hex hexagon for easy tightening. Supplied with a 0.5mm gap, the plug is compatible with Dinan ignition coils and is ideal for applications requiring reliable performance and longevity. Always verify the size, gap, and heat range before installation to prevent engine damage. Made in the EU, this spark plug is suitable for a range of BMW engines including B48, B58, and S58, providing an effective upgrade for enthusiasts seeking improved ignition and engine efficiency.

Features:

• Made from iridium for maximum strength and longevity

• Higher melting point and heat dissipation for cooler operation

• Optimized electrode design for hard-to-ignite fuels like ethanol

• 1 step colder heat range to prevent overheating and preignition

• Compatible with high-performance and stock engine applications

• Lower required voltage for reliable spark delivery

• Thread diameter: 12mm, thread reach: 26.5mm, hex size: 14mm Bi-Hex

• Supplied with a 0.5mm gap, insulator material: ceramic

• Designed for easy installation with recommended torque of 17 Nm

• Suitable for BMW B48, B58, and S58 engines, made in the EU

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Units Per Sku: 1
Regular Stock: t