NGK 95399 Laser Iridium High-Ignitability Spark Plug M10x1.0 26.5 mm Reach

Vehicle Fitment

• Designed for select high-performance motorcycle and sportbike engines that require the M10x1.0 mm thread and 26.5 mm reach specification; verify exact engine code before purchase.

Features

• Laser Iridium centre electrode offers exceptional durability and ignitability compared to standard plugs.
• Square Platinum Electrode (SPE) design on the ground electrode enhances spark performance under high heat and stress.
• Copper core with high-purity alumina ceramic insulator enables superior heat dissipation and insulation.
• Designed for high-efficiency engines requiring premium plug specification rather than standard replacements.

Specifications

• Part Number: 95399
• Thread Size: M10 x 1.0 mm
• Reach (Thread Length): 26.5 mm
• Seat Type: Flat (crush washer)
• Electrode Design: Iridium centre tip with SPE ground electrode
• Resistance: Approx. 5000 Ω (resistor type)
• Hex Size: 14 mm
• Use Type: High-performance / premium OE-equivalent spark plug

Included Components

• 1x NGK 95399 Laser Iridium spark plug

Product Description

The NGK 95399 Laser Iridium spark plug is a high-ignitability, premium replacement plug engineered for performance engines with demanding ignition requirements. With its iridium tipped centre electrode and Platinum ground electrode design, it is designed to maintain strong spark delivery, longer service life, and consistent performance in high-stress environments.

With a tailored fitment of M10x1.0 mm thread and 26.5 mm reach, this plug is suitable for specialized engines with tighter combustion chamber geometry, such as sportbikes or performance motorcycles. Installation is straightforward: ensure the engine's original plug requirements match this specification, use correct torque, and replace in sets where applicable.

Always confirm the plug's thread size, reach, seat type, and engine compatibility before purchase. Because this plug is designed for high-performance applications rather than generic everyday use, it offers a premium upgrade path for enthusiasts seeking reliable ignition and longevity under demanding conditions.