NGK Standard Spark Plug – LMAR6C-9 | Box of 10 | NGK1679

NGK LMAR6C-9 standard nickel spark plug — sold as a box of 10. Resistor type, 0.9mm factory pre-set gap, heat range 6, compact hex design. OE-quality nickel construction. NGK catalogue number 1679.

Verify the correct plug code and gap specification against your engine manufacturer’s requirements before ordering. Always confirm plug gap before installation.

LMAR6C-9 — Plug Code Breakdown

• L — Long reach thread
• M — Compact (small diameter) thread/hex designation
• A — Hex size designation
• R — Resistor — suppresses ignition EMI for electronics compatibility
• 6 — Heat range 6 (mid-range on NGK scale — lower numbers are hotter, higher numbers are colder)
• C — Special design feature — compact / tapered seat construction
• 9 — Factory pre-set gap: 0.9mm

NGK Standard Nickel Construction

NGK Standard plugs use OE-specification nickel alloy electrodes — the proven baseline for reliable ignition performance across a wide range of operating conditions. Key construction features:

• High-grade alumina silicate ceramic insulator — NGK’s proprietary ceramic formulation provides a stronger insulator body for improved dielectric performance and resistance to thermal shock
• Triple gasket sealing — prevents combustion gas leakage past the plug shell
• 98% pure copper core — provides superior heat dissipation from the firing end and excellent electrical conductivity across a wide heat range
• Trivalent metal plating — anti-corrosion and anti-seizing coating on the thread and hex, protecting against galling in aluminium cylinder heads and simplifying removal at service intervals

Box of 10

Sold as a factory box of 10 plugs — not sold individually. The LMAR6C-9 compact hex design is used across multiple cylinders in some engine configurations — confirm the quantity required for your application against the number of cylinders and plugs per cylinder before ordering.

Verify LMAR6C-9 is the correct plug for your engine before ordering. Confirm gap at 0.9mm against your engine manufacturer’s specification — adjust if required. Install to manufacturer’s torque specification — do not overtorque in aluminium heads. Box of 10 — not sold individually.

Specifications

• Brand: NGK
• Plug Code: LMAR6C-9
• NGK Catalogue Number: 1679
• Type: Standard nickel
• Resistor: Yes
• Heat Range: 6
• Gap: 0.9mm (factory pre-set)
• Quantity: Box of 10
• Weight: 0.9 lbs (box)