NGK 3108 Standard Spark Plug (DPR6EB-9), Copper Core, 18mm Hex, 5000 Ohm Resistor

The NGK 3108 is a Standard spark plug built around NGK's proven copper-core design, sold under the NGK part designation DPR6EB-9. It uses a solid copper core center electrode for superior heat dissipation and conductivity, paired with a nickel center electrode tip and a nickel ground electrode in a Standard ground configuration. The broad heat range of NGK Standard plugs makes them an OE-cornerstone choice that has delivered reliable performance for decades. A 5000 ohm resistor is built into the plug to help suppress ignition interference. All exterior surfaces are treated with corrosion-resistant plating, which keeps threads turning freely so the plug installs and removes without seizing, even after extended service. The plug has an 18mm hex size for use with a standard spark plug socket. Because the correct plug depends on the exact engine it is installed in, always check your engine and maintenance manual and use only the spark plug your engine manufacturer recommends -- installing the wrong plug can reduce performance and fuel economy or cause engine damage.

Specifications

• Brand: NGK
• Manufacturer Part Number: 3108
• NGK Part Designation: DPR6EB-9
• UPC: 087295131084
• Ground Configuration: Standard
• Ground Electrode Core Material: Nickel
• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Nickel
• Insulator Material: Alumina
• Hex Size: 18mm
• Resistance: 5000 ohm
• Vehicle Service Type: Motorcycle
• Package Dimensions: 3.26 inches L x 0.98 inches W x 0.78 inches H
• Quantity: 1 spark plug
• Weight: 0.15 pounds

Frequently Asked Questions

What is the NGK 3108 spark plug? The NGK 3108 is a Standard spark plug, also identified by NGK as DPR6EB-9, built with a solid copper core center electrode and nickel electrode tips for reliable, OE-style performance.

What is the hex size of the NGK 3108 spark plug? The NGK 3108 (DPR6EB-9) has an 18mm hex size, so it takes a standard spark plug socket sized for that hex.

What is the resistance rating of this spark plug? 5000 ohm of built-in resistance is standard on the NGK 3108, which helps suppress ignition interference.

What materials are used in the NGK 3108 electrodes? Copper forms the center electrode core, with nickel used for both the center electrode tip and the ground electrode, and the insulator is alumina.

Is the NGK 3108 a resistor spark plug? Yes, the NGK 3108 (DPR6EB-9) is built with a 5000 ohm resistor to help suppress ignition noise and interference.

How much does the NGK 3108 spark plug weigh? The NGK 3108 spark plug weighs 0.15 pounds.

What is the ground electrode configuration on this plug? NGK part 3108 uses a Standard ground electrode configuration rather than a projected or multi-ground design.

Does the NGK 3108 come corrosion protected? Yes, the NGK 3108 is treated with corrosion-resistant plating on its exterior, which keeps threads from seizing and makes installation and removal easier over the plug's service life.

What vehicle type is the NGK 3108 spark plug used on? The NGK 3108 (DPR6EB-9) is listed for Motorcycle vehicle service type applications.

How many spark plugs come in one NGK 3108 purchase? One NGK 3108 spark plug is included per unit purchased.

Should I confirm fitment before installing the NGK 3108? Yes -- check your engine and maintenance manual and use only the spark plug recommended by your engine's original equipment manufacturer before installing the NGK 3108, since the wrong plug can reduce performance, hurt fuel economy, or damage the engine.

Is the NGK 3108 an OE-style Standard plug or a premium iridium plug? The NGK 3108 (DPR6EB-9) is a Standard copper-core spark plug, not an iridium or platinum design, positioned as an OE-cornerstone replacement plug.