Iridium IX Spark Plug (CR9EIX)
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Iridium IX Spark Plug (CR9EIX) Iridium IX Spark Plug (CR9EIX) Iridium IX Spark Plug (CR9EIX)
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NGK Iridium IX Spark Plug (CR9EIX)

Part No. 3521 Warranty  

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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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Electrode Core Material:Iridium
Electrode Tip Material:Iridium
Ground Strap Quantity:1
Manufacturer Heat Range:9
Resistor:Yes
Shorty Spark Plug:No
Spark Plug Reach:3/4 in
Spark Plug Seat Type:gasket
Spark Plug Thread Size:10 mm
Tip Configuration:Loose
Type:Iridium IX
Wrench Diameter:5/8 in

REVIEW SNAPSHOT®

by PowerReviews
NGKIridium IX Spark Plug (CR9EIX)
 
4.7

(based on 3 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

    Cons

      Best Uses

      • Performance driving (3)

      Reviewed by 3 customers

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      Displaying reviews 1-3

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      (2 of 2 customers found this review helpful)

       
      5.0

      Triumph Street Triple R

      By JWhite

      from Detroit, MI

      About Me Auto Enthusiast, Casual Driver

      Verified Buyer
      Level 1

      Pros

      • Engine Runs Smooth

      Cons

      • No Cons

      Best Uses

      • Everyday Driving
      • Performance Driving
      • Racing
      • Replacement

      Comments about NGK Iridium IX Spark Plug (CR9EIX):

      These plugs come with a removable tip. If using for a Triumph STR you have to remove it in order for the plug to fit into the coil. Some say they can feel an increase in power over the OEM NGK plugs. If there is its minimal. My reason for paying a little more for this plug over the OEM was there wasn't enough of a price difference to justify not using the best plug NGK has to offer for my bike.

      I swear by NGK spark plugs. My dad and I use them in everything. Triumph, Harley, Corvette, BMW and we've never had a problem.

      Comment on this review(earn points)

      (1 of 1 customers found this review helpful)

       
      5.0

      Factory Suzuki Hayabusa Gen I &II plugs

      By flatback1986

      from Cedar Rapids Iowa

      Verified Buyer
      Level 1

      Pros

      • Easy To Install
      • Same as factory Gen12

      Cons

        Best Uses

        • Everyday Driving
        • Performance Driving
        • Racing

        Comments about NGK Iridium IX Spark Plug (CR9EIX):

        Factory Suzuki Gsx 1300R replacement. Works in Gen I and II. My 2000 runs smoother now.

        • Car & Truck:
        • Casual Driver

        Comment on this review(earn points)

        (0 of 1 customers found this review helpful)

         
        4.0

        good product

        By tim

        from Moneta VA

        Verified Buyer

        Pros

        • Improves Engine Efficiency

        Cons

        • none

        Best Uses

        • Performance Driving
        • Used in jet ski

        Comments about NGK Iridium IX Spark Plug (CR9EIX):

        none

        • Car & Truck:
        • See above

        Comment on this review(earn points)

        Displaying reviews 1-3

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        Do you have questions about this product?(earn points for answers!)

         

        Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

        3 Questions | 3 Answers
        Displaying questions 1-3
        • Q:

          Are the plugs pregapped or do i have to adjust the gap to the recommended gap for my vehcile
          Asked on 7/16/2013 by Raj

          1 answer

          • CUSTOMER CARE

            A:

            With reference to your inquiry on the NGK Iridium IX Spark Plug (CR9EIX) - Part No. 3521, all the spark plugs are pre-gapped from the factory, the fact remains that the gap must be adjusted for the vehicle that the spark plug is intended for. Those with modified engines must remember that a modified engine with higher compression or forced induction will typically require a smaller gap settings. For compatibility with your vehicle, please provide the year, make, model and engine size of your vehicle and for any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

            Answered on 7/17/2013 by Morgan from AAP
        • Q:

          How many come with a order of 1?
          Asked on 9/25/2012 by G from Tampa, FL

          1 answer

          • CUSTOMER CARE

            A:

            This part NGK Iridium IX Spark Plug (CR9EIX), Part No. 3521 is sold individually.
            For compatibility of this part with your vehicle, please provide your vehicle make, model and engine specification.
            For any further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and our representatives would be more than happy to assist you.

            Answered on 9/25/2012 by Aaron from AAP
        • Q:

          Hi!

          I need CR9EIX spark plug 15 box (60pcs) but I from Hungary.You send the item for me? How much the post cost and how many the spark plug price? This is for my first order but I need spark plug always.I order from USA but my parner is empty.Please write me.Very important for me!
          Asked on 8/12/2010 by Anonymous

          1 answer

          • CUSTOMER CARE

            A:

            Currently at this time we do not ship outside of the United States.

            Answered on 8/12/2010 by Kevin from AAP
        Displaying questions 1-3

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        Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.