Top 8 Iridium Spark Plugs for – Automotive Replacement Spark Plugs

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1. Denso

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DENSO IK20 Iridium Power Spark Plug Ik20 X 4Pieces Ignition Plugs Racing Upgrade

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Denso #ad - Improve Acceleration. Improve Fuel Mileage. Improve Horse power. Its high performance is only possible from the 04mm center electrode.
BrandDenso #ad
ManufacturerDENSO #ad
Weight0.09 Pounds
Part NumberIK20

2. Autolite

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Pack of 4, Fram Autolite XP5325 Iridium XP Spark Plug

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Autolite #ad - Designed for better overall durability with virtually no gap erosion for longer plug life. Oe equivalent design is engineered for every engine to ensure the right plug for your vehicle. Iridium-enhanced platinum alloy 06mm fine wire center electrode for improved ignitibility performance. Patented v-trimmed platinum side wire technology resists wear.
BrandAutolite #ad
ManufacturerFRAM #ad
Part NumberXP5325
ModelXP5325-4PK
WarrantyLifetime Limited

3. NGK

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

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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.

Trivalent metal Plating provides superior anti-corrosion and anti-seizing properties. 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. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines.
BrandNGK #ad
ManufacturerNGK #ad
Weight0.01 Pounds
Part Number93501
Model93501

4. NGK

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

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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.

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

5. NGK

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

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NGK #ad - 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. 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. 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

6. NGK

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NGK # 6509 Iridium Spark Plug LTR6IX-11, 6 PCSNEW

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NGK #ad - 1order = 6 Pieces. Better Performance. Iridium. Free shipping to anywhere in usA and territories For This Item. Good brand Name NGK.
BrandNGK #ad
ManufacturerNGK #ad
Height4.98 Inches
Length3.7 Inches
Weight0.65 Pounds
Width0.94 Inches
Part Number6509
ModelLTR6IX-11

7. NGK

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NGK CR8EIX Iridium IX Spark Plug

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NGK #ad - Trivalent metal plating has superior anti-corrosion and anti-seizing properties. The 06mm 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.
BrandNGK #ad
ManufacturerNGK #ad
Height3 Inches
Length9 Inches
Weight0.07 Pounds
Width3 Inches
Part NumberCR8EIX
ModelCR8EIX

8. 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 - 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.

Upgrade your ride: level up over oem, v-power, g-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.

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.
BrandSixity Auto #ad
ManufacturerSixity Auto #ad
Height13.28 Inches
Length3.7 Inches
Weight1.92 Pounds
Width0.94 Inches
Part Number4024123628