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NGK LMAR9D-J (1633) Multi-Ground Spark Plug
NGK LMAR9D-J is a standard nickel spark plug featuring a dual ground electrode design. This configuration is used in applications where consistent ignition over time is prioritized, helping maintain performance as electrode wear occurs.
Built to meet OEM requirements, this plug combines conventional materials with NGK’s proven construction for durability and stable operation.
Key Features
Dual ground electrodes for extended service consistency
Nickel center electrode with standard 2.5mm tip
Solid terminal configuration for secure connection
Trivalent metal plating for corrosion and anti-seize resistance
Corrugated ribs help prevent flashover
Alumina silicate ceramic insulator for strength and heat transfer
Copper core aids in heat dissipation
Specifications
Thread Diameter: 10mm
Thread Pitch: 1.0mm
Seat Type: Gasket
Reach: 26.5mm (1.04")
Hex Size: 14mm (9/16")
Terminal Type: Solid
Spark Gap: 0.031" (0.8mm)
Electrode
Center Electrode Material: Nickel
Center Electrode Type: Standard (2.5mm)
Projection: Projected
Ground Electrode Material: Nickel
Ground Electrode Type: Multi-Ground
Ground Electrode Quantity: 2
Electrical
Resistor: Yes
Resistance: 5k Ohm
Heat Range: 9
Additional
Brand: NGK / NTK
Longevity: ~50,000 miles (application dependent)
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NGK LMAR9D-J Spark Plug

Spark Plugs / NGK

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$28.95

Availability: Out of Stock

Quantity:

123 Out of Stock

Earn $1.45 in UBD Bucks

Fitment:
This is a universal fit part; it may or may not fit without modification

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Brand:

NGK

SKU:

2103-0304

Description:

NGK LMAR9D-J (1633) Multi-Ground Spark Plug

NGK LMAR9D-J is a standard nickel spark plug featuring a dual ground electrode design. This configuration is used in applications where consistent ignition over time is prioritized, helping maintain performance as electrode wear occurs.

Built to meet OEM requirements, this plug combines conventional materials with NGK’s proven construction for durability and stable operation.

Key Features

• Dual ground electrodes for extended service consistency
• Nickel center electrode with standard 2.5mm tip
• Solid terminal configuration for secure connection
• Trivalent metal plating for corrosion and anti-seize resistance
• Corrugated ribs help prevent flashover
• Alumina silicate ceramic insulator for strength and heat transfer
• Copper core aids in heat dissipation

Specifications

• Thread Diameter: 10mm
• Thread Pitch: 1.0mm
• Seat Type: Gasket
• Reach: 26.5mm (1.04″)
• Hex Size: 14mm (9/16″)
• Terminal Type: Solid
• Spark Gap: 0.031″ (0.8mm)

Electrode

• Center Electrode Material: Nickel
• Center Electrode Type: Standard (2.5mm)
• Projection: Projected
• Ground Electrode Material: Nickel
• Ground Electrode Type: Multi-Ground
• Ground Electrode Quantity: 2

Electrical

• Resistor: Yes
• Resistance: 5k Ohm
• Heat Range: 9

Additional

• Brand: NGK / NTK
• Longevity: ~50,000 miles (application dependent)

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