Performance Overview

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

Specifications

• Part Number: ZFR6AIX-11S
• Stock Number: 97138
• Resistance: 5000
• Ground Electrode Tip Design: Taper Cut
• Ground Configuration: Standard
• Ground Electrode Core Material: Nickel
• Electrical Terminal Type: Non-Removable Nut
• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Iridium
• Gap Size: .044
• Ground Electrode Quantity: 1
• Hex Size: 5/8
• Insulator Height: 53.00
• Manufacturer Heat Range: 6
• Seat Type: Flat
• Reach: .75
• Thread Diameter: 14.00

Notes

• You may need to order more than one of this item for your car.

Key Features

• Single Iridium Tip: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
• Iridium Alloy Center Electrode: Iridium's density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
• Tapered Cut Ground Electrode: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
• Solid Copper Core: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
• Trivalent Metal Plating: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
• Recommended Usage: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs

Vehicle Fitment Table

FAQ

Will this fit my vehicle?
Please verify your year, make, model, position, and any fitment notes using the Vehicle Fitment Table above before purchase.

What part number is this?
The listed part number is 97138.

Is this product designed for direct replacement?
Yes. This product is intended to match the compatible vehicle applications listed in the fitment table.

Should I confirm fitment before ordering?
Yes. Always compare your original part, position, and vehicle details with the fitment table before ordering.

Common Searches

• Iridium IX Spark Plug Box of 4 for Acura MDX Base
• 97138 fitment
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