Top 8 Iridium IX Spark Plug – Automotive Replacement Spark Plugs

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1. Sixity Auto

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16 pcs NGK Iridium IX Spark Plugs for 2011-2017 Ram 1500 5.7L V8, Engine Kit Set Tune Up

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Sixity Auto #ad - Enhance performance: the iridium alloy used in the NGK Iridium IX is six times harder and eight times stronger than conventional platinum and can handle temperatures associated with fuel-injected and turbocharged engines.

Maximize ignitability: the focused flame kernel allows faster combustion, and the tapered-center ground electrode reduces energy absorption. Upgrade your ride: level up over oem, g-power, v-power, and standard grade plugs with the NGK Iridium IX Spark Plug that provides superior performance and durability. Deliver outstanding acceleration: the iridium center electrode delivers maximum spark energy to achieve higher ignitability and improved acceleration in comparison with normal plugs.

Ensure reliability: extremely durable under high heat and capable of delivering a consistent and stable spark, these spark plugs feature trivalent metal plating that provides superior anti-corrosion and anti-seizing properties.
BrandSixity Auto #ad
ManufacturerSixity Auto #ad
Height13.28 Inches
Length3.7 Inches
Weight1.92 Pounds
Width0.94 Inches
Part Number4024123628

2. NGK

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4 Pack, NGK LKAR7BIX-11S Iridium IX Spark Plug 93501 Iridium Ix

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NGK #ad - Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage.

Trivalent metal Plating provides superior anti-corrosion and anti-seizing properties. Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines. The 06 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect.
BrandNGK #ad
ManufacturerNGK #ad
Weight0.01 Pounds
Part Number93501
Model93501

3. NGK

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NGK 7397-4PK TR5IX Iridium IX Spark Plug, Box of 4

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NGK #ad - Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage.

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling. The 06mm laser welded fine iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical Quenching Effect. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high-performance engines. Trivalent metal Plating - superior anti-corrosion and anti-seizing properties.
BrandNGK #ad
ManufacturerNGK #ad
Height1 Inches
Length4.1 Inches
Weight0.15 Pounds
Width3.5 Inches
Part Number7397
Model7397-4PK

4. NGK

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NGK 5464-4PK Iridium IX Spark Plug, Box of 4

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NGK #ad - The 06 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect.

Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines. Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage. Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling. Trivalent metal plating provides superior anti-corrosion and anti-seizing properties; Part number of spark plug inside the box: BKR5EIX-11.
BrandNGK #ad
ManufacturerNGK #ad
Height0.7 Inches
Length3.4 Inches
Weight0.1 Pounds
Width0.8 Inches
Part Number5464
Model5464-4PK
WarrantyLimited Warranty

5. NGK

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NGK ZFR5FIX-11 Plugs

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NGK #ad - Package Quantity: 1. Country of Origin: Japan. Package dimensions: 2. 54 cms l x 8. 89 cms w x 1016 cms H. Product type: Spark Plug.
BrandNGK #ad
ManufacturerNGK #ad
Height0.81 Inches
Length4.07 Inches
Weight0.02 Pounds
Width3.47 Inches
Part Number2477
Model2477
WarrantyManufacturer Warranty

6. NGK

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NGK 4344 4344 LTR5IX-11 Iridium IX Spark Plug, Pack of 1, Pack of 1

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NGK #ad - Fine iridium tip ensures high durability. You can depend on NGK for quality and reliability. Fit type: Vehicle Specific. Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines. Features superior anti-corrosion and anti-seizing properties. Constructed from durable material.
BrandNGK #ad
ManufacturerNGK #ad
Height1.5 Inches
Length0.35 Inches
Weight0.1 Pounds
Width0.39 Inches
Part NumberLTR5IX-11
ModelLTR5IX-11
WarrantyWe warrant all products sold to be free from defects in material or workmanship for a period of 12 months or 12,000 miles whichever is greater. Our warranty does not cover any labor cost for removal, installation or damage resulting from delay or loss of use in service or repair or for incidental or consequential damages. General terms and conditions of sale are available upon request.

7. NGK

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4 Pack, NGK LKR7DIX-11S Iridium IX Spark Plug 93175 Iridium Ix

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NGK #ad - Trivalent metal plating provides superior anti-corrosion and anti-seizing properties. The 06 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect.

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines. Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage. Resistor Value-5K Ohm. Hex size-5/8 inch.
BrandNGK #ad
ManufacturerNGK #ad
Weight0.4 Pounds
Part Number93175
Model93175

8. NGK

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Box of 4, NGK 3521-4PK Iridium IX Spark Plug

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NGK #ad - Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines. Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage.

Trivalent metal plating provides superior anti-corrosion and anti-seizing properties; Part number of spark plug inside the box: CR9EIX. Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling. The 06 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect.
BrandNGK #ad
ManufacturerNGK #ad
Height0.6 Inches
Length3.3 Inches
Weight0.07 Pounds
Width0.8 Inches
Part Number3521-4PK
Model3521-4PK
Warranty1 year manufacturer