NGK Ruthenium HX Spark Plugs

4.89 out of 5 stars 36 Customer Reviews

NGK Ruthenium HX spark plugs are designed for newer engines which demand high ignitability. Double Fine Electrode (DFE) engineering promotes spark energy concentrat

NGK Ruthenium HX spark plugs are designed for newer engines which demand high ignitability. Double Fine Electrode (DFE) engineering promotes spark energy concentration and ignites a wider range of air/fuel ratios, offering improved performance in rich or lean engine conditions. Order the plugs recommended for fitment on your application. Additional details: * 0.4mm Ruthenium alloy fine-wire center electrode and 0.8mm platinum fine-wire ground electrode * Trivalent metal platinum provides superior anti-corrosion and anti-seizing properties * Corrugated ribs prevent flashover * Pure alumina silicate ceramic i

Results 1 - 25 of 25

NGK Ruthenium HX Spark Plugs TR5AHX

Spark Plugs, Ruthenium HX, Platinum, Resistor, 14mm Thread Size, 0.708 in. Reach, Tapered Seat, Each

Part Number: NGK-94567

5.0 out of 5 stars ( 9 )

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NGK Ruthenium HX Spark Plugs LTR7BHX

Spark Plug, Ruthenium HX, Ruthenium, 14mm Thread, 0.984 in. Reach, Tapered Seat, 5/8 in. Wrench Size, Each

Part Number: NGK-95605

5.0 out of 5 stars ( 5 )

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NGK Ruthenium HX Spark Plugs LTR5AHX

Spark Plugs, Ruthenium HX, Platinum, Resistor, 14mm Thread Size, 25mm Reach, Tapered Seat, Each

Part Number: NGK-90220

5.0 out of 5 stars ( 3 )

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NGK Ruthenium HX Spark Plugs LFR5AHX

Spark Plug, Ruthenium HX, 14mm Thread, Heat Range 5, 26.5mm Reach, Gasket Seat, Double Fine Electrode, Each

Part Number: NGK-96355

5.0 out of 5 stars ( 1 )

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NGK Ruthenium HX Spark Plugs LTR6BHX

Spark Plug, Ruthenium HX, Ruthenium, 14mm Thread, 0.984 in. Reach, Tapered Seat, 5/8 in. Wrench Size, Each

Part Number: NGK-90495

4.2 out of 5 stars ( 5 )

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NGK Ruthenium HX Spark Plugs LTR6AHX

Spark Plug, Ruthenium HX, 14mm Thread, 25mm. Reach, Resistor, Tapered Seat, Each

Part Number: NGK-91276

5.0 out of 5 stars ( 3 )

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NGK Ruthenium HX Spark Plugs LFR6AHX-S

Spark Plugs, Ruthenium HX, Resistor, 14mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-94122

5.0 out of 5 stars ( 2 )

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NGK Ruthenium HX Spark Plugs LKR7BHX

Spark Plug, Ruthenium HX, Copper Core, Projected, 12mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-94705

Not Yet Reviewed

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NGK Ruthenium HX Spark Plugs LFER7BHX

Spark Plug, Ruthenium HX, Copper Core, Projected, 14mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-95125

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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NGK Ruthenium HX Spark Plugs LKAR7AHX-S

Spark Plug, Ruthenium HX, Copper Core, Projected, 12mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-92274

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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NGK Ruthenium HX Spark Plugs LFR6BHX

Spark Plug, Ruthenium HX, Copper Core, Projected, 14mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-93420

Not Yet Reviewed

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NGK Ruthenium HX Spark Plugs LKAR8BHX

Spark Plug, Ruthenium HX, Copper Core, Projected, 12mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-91784

Not Yet Reviewed

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NGK Ruthenium HX Spark Plugs FR6AHX-S

USE NIP 4702

Part Number: NGK-94279

Not Yet Reviewed

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NGK Ruthenium HX Spark Plugs FR7BHX-S

Spark Plugs, Ruthenium HX, Copper, Resistor, 14mm Thread Size, 0.750 in. Reach, Flat Seat, Each

Part Number: NGK-92400

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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NGK Ruthenium HX Spark Plugs LKR7AHX-S

Spark Plug, Ruthenium HX, Copper Core, Projected, 12mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-96358

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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NGK Ruthenium HX Spark Plugs TR6AHX

Spark Plug, Ruthenium HX, Ruthenium, 14mm Thread, 0.708 in. Reach, Tapered Seat, 5/8 in. Wrench Size, Each

Part Number: NGK-92714

Not Yet Reviewed

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NGK Ruthenium HX Spark Plugs LKR8BHX-S

Spark Plug, Ruthenium HX, Copper Core, Projected, 12mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-90465

Not Yet Reviewed

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NGK Ruthenium HX Spark Plugs FR5BHX

Spark Plug, Ruthenium HX, Copper Core, Projected, 14mm Thread Size, 0.750 in. Reach, Gasket Seat, Each

Part Number: NGK-96457

Not Yet Reviewed

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NGK Ruthenium HX Spark Plugs LKAR6AHX

Spark Plug, Ruthenium HX, Copper Core, Projected, 12mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-97292

Not Yet Reviewed

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NGK Ruthenium HX Spark Plugs TR4BHX

USE NIP 5325

Part Number: NGK-97100

Not Yet Reviewed

Estimated Ship Date: Aug 29, 2025 if ordered today

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Estimated Ship Date: Aug 29, 2025 if ordered today

NGK Ruthenium HX Spark Plugs LKR6BHX-E

Spark Plug, Ruthenium HX, Copper Core, Projected, 12mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-93763

Not Yet Reviewed

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NGK Ruthenium HX Spark Plugs FR5AHX

USE NIP 4701

Part Number: NGK-95839

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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NGK Ruthenium HX Spark Plugs FR6BHX-S

Spark Plug, Ruthenium HX, Copper Core, Projected, 14mm Thread Size, 0.750 in. Reach, Gasket Seat, Each

Part Number: NGK-95159

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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NGK Ruthenium HX Spark Plugs LKR6AHX

Spark Plug, Ruthenium HX, Copper Core, Projected, 12mm Thread Size, 26.5mm Reach, Gasket Seat, Each

Part Number: NGK-91356

Not Yet Reviewed

Estimated Ship Date: Aug 29, 2025 if ordered today

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Estimated Ship Date: Aug 29, 2025 if ordered today

NGK Ruthenium HX Spark Plugs FR5AHX-E

Spark Plug, Ruthenium HX, Copper Core, Projected, 14mm Thread Size, 0.750 in. Reach, Gasket Seat, Each

Part Number: NGK-92375

Not Yet Reviewed

Estimated Ship Date: Sep 25, 2025 if ordered today

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Estimated Ship Date: Sep 25, 2025 if ordered today

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