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Reliable Nickel Spark Plug Performance
The NGK B9EFS nickel spark plug is identified by NGK stock number 1085 and is built around the manufacturer's proven standard-material spark plug design. This listing includes a box of 10 plugs for engines that specifically call for the B9EFS plug number.
Key Features
- Specially designed V-groove center electrode supports ignitability and helps reduce quenching
- 98 percent pure copper core improves heat dissipation for reliable starts and reduced overheating risk
- Cold-rolled threads help reduce cross-threading and cylinder-head damage
- Trivalent plating eliminates the need for anti-seize during installation
- High-grade alumina silicate ceramic insulator construction
Fitment
| Application | Requirement |
|---|---|
| Engine-specific | Use only where the engine manufacturer or current NGK application catalog specifies B9EFS |
NGK states that 1085 is a stock-management number, not a heat-range or plug-type code. Confirm compatibility using the B9EFS plug number before ordering.
Specifications
| Detail | Value |
|---|---|
| Brand | NGK |
| MPN / Plug Number | B9EFS |
| NGK Stock Number | 1085 |
| Product Type | Nickel spark plug |
| Center Electrode Design | V-groove |
| Core | 98 percent pure copper |
| Thread Finish | Trivalent plating |
| Package Quantity | 10 spark plugs |
What's Included
- 10 x NGK B9EFS nickel spark plugs
About NGK
NGK develops ignition components for original-equipment and service applications. Its nickel spark plug line combines a copper core, V-groove electrode design, cold-rolled threads, trivalent plating and a high-grade ceramic insulator.
FAQ
What is the B9EFS?It is an NGK nickel spark plug identified in the manufacturer's catalog by stock number 1085.
How many spark plugs are included?This listing includes a box of 10 spark plugs.
Is 1085 the plug specification?No. NGK describes it as a stock-management number with no relation to heat range or plug type.
How should I confirm compatibility?Match the plug number shown in your engine documentation or current NGK application catalog before ordering.
Does this plug use a copper core?Yes. NGK states that its nickel spark plugs use a 98 percent pure copper core for heat dissipation.
Should anti-seize be applied?NGK states that the trivalent plating on its nickel spark plugs eliminates the need for anti-seize.
What does the V-groove electrode do?NGK says the design improves ignitability and reduces quenching.
Are torque and gap specifications included here?No. Use the engine manufacturer's specifications for the exact application rather than applying a universal value.
Install Instructions
- Confirm that the engine manufacturer or current NGK catalog specifies the correct plug number for the application.
- Allow the engine to cool fully before removing the existing spark plug.
- Verify the required electrode gap using the engine manufacturer's service information.
- Start the replacement plug by hand to prevent cross-threading.
- Tighten the plug to the engine manufacturer's specified torque without applying anti-seize.
- Reconnect the ignition lead or coil and confirm that it is fully seated.
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