Iridium IX Spark Plug (CR7EIX)
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Iridium IX Spark Plug (CR7EIX) Iridium IX Spark Plug (CR7EIX)
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NGK Iridium IX Spark Plug (CR7EIX)

Part No. 7385 Warranty Details  
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Laser-welded iridium center electrode is resistant to heat, corrosion and electrical wear. The tapered ground electrode minimizes quenching. Provides outstanding acceleration, high fuel efficiency and durability.

Product Features:
  • 0.6 mm iridium-tip center electrode provides durability and a high melting point
  • Taper-cut ground electrode shape provides improved flame reproduction
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Center Electrode Core Material:Copper Core
Center Electrode Tip Material:Iridium
Electrode Core Material:Iridium
Electrode Tip Material:Iridium
Gap Size:0.032 in
Ground Configuration:Standard
Ground Electrode Core Material:Nickel Core
Ground Electrode Quantity:1
Ground Electrode Tip Design:Taper Cut
Ground Strap Quantity:1
Hex Size:5/8
Manufacturer Heat Range:7
Reach:19 mm
Seat Type:Gasket
Shorty Spark Plug:No
Thread Diameter:10 mm
Tip Configuration:Loose
Type:Iridium IX
Wrench Diameter:5/8 in

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1 Question | 2 Answers
Displaying question 1
  • Q:

    I need a NGK CR7E. How does the plug I need differ from the NGK CR7EIX ?
    Asked on 4/7/2013 by Doc from Elizabeth City, NC

    2 answers



      The differences of NGK Nickel Spark Plug (CR7E) - Part No. 4578 from NGK Iridium IX Spark Plug (CR7EIX) - Part No. 7385 is in NGK Nickel Spark Plug (CR7E) , its Electrode Core and Tip Material is made of nickel and its Tip Configuration is Stud. While in NGK Iridium IX Spark Plug (CR7EIX), its Electrode Core and Tip Material is made of Iridium and its Tip Configuration is Loose. For compatibility of this part with your vehicle please provide the year, make, model and engine size of your vehicle application or you can contact us directly at 1-877-ADVANCE (238-2623) or visit your nearest Advance Auto Parts store for further assistance.

      Answered on 4/8/2013 by Morgan from AAP
    • A:

      I have a 2010 Yamaha Majesty (YP400). Yamaha uses a CR7E. I have been using the CR7EIX without any issues. The Main difference is, The Iridium has a Harder and Smaller tip than the Stock. Iridium is used in New Vehicles (From manufacturer. The Smaller tip requires less power to fire. Iridium doesn't wear out as fast.

      Answered on 2/25/2014 by Chris from Trenton, NJ
Displaying question 1

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