SKJ20DR-M11 Iridium Long Life Spark Plug
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Denso SKJ20DR-M11 Iridium Long Life Spark Plug

Part No. 3377 Warranty Details  

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This long-life spark plug features a special iridium alloy (90% Ir) and a platinum ground strap.
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Electrode Core Material:Copper
Electrode Tip Material:0.7mm Iridium
Ground Strap Quantity:1
Insulator Type:Purified Alumina
Manufacturer Heat Range:20
Material:0.7mm Iridium
Reach:3/4 in
Resistor:Yes
Seat Type:Gasket
Thread Diameter:14 mm
Tip Configuration:0.7mm Iridium
Type:Iridium Long Life
Wrench Diameter:5/8 in

REVIEW SNAPSHOT®

by PowerReviews
DensoSKJ20DR-M11 Iridium Long Life Spark Plug
 
4.6

(based on 8 reviews)

Ratings Distribution

  • 5 Stars

     

    (6)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

86%

of respondents would recommend this to a friend.

Pros

  • Increases power (5)
  • Durable (4)
  • Improves engine efficiency (4)
  • Easy to install (3)

Cons

No Cons

Best Uses

  • Everyday driving (4)
  • Replacement (4)
    • Reviewer Profile:
    • Auto enthusiast (3), Casual driver (3)

Reviewed by 8 customers

Displaying reviews 1-8

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5.0

So far so good..car had hesitation with Bosch plugs.

By 

from Houston

Verified Buyer

Comments about Denso SKJ20DR-M11 Iridium Long Life Spark Plug:

Great plugs

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3.0

Not worth the price JDM does not mean better

By 

from Miami ,Fl

About Me Part time Street Racer

Comments about Denso SKJ20DR-M11 Iridium Long Life Spark Plug:

I bought these for my 07 accord 3.0 but they are definitely not worth the money. I honestly got better performance out of a set of Bosch platinum Fusions and at 8 a pop they had a greater overall throttle response while running or from a dead stop. I would only recommend these if you want to run OEM plugs.

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5.0

Love the spark plugs

By 

from Manvel Texas 77578

Verified Buyer

Pros

  • Easy To Install
  • Increases Power

Cons

    Best Uses

    • Replacement

    Comments about Denso SKJ20DR-M11 Iridium Long Life Spark Plug:

    Had a mid fire on the 1 cylinder

    Comment on this reviewHelp Icon

    (2 of 4 customers found this review helpful)

     
    5.0

    good product

    By 

    from Chippewa Falls Wi

    About Me Auto Enthusiast, Casual Driver, Mechanic

    See all my reviews

    Ask me a question

    Verified Buyer

    Pros

    • Durable
    • Easy To Install
    • Improves Engine Efficiency
    • Increases Power

    Cons

      Best Uses

      • Everyday Driving
      • Performance Driving
      • Replacement
      • Restoration

      Comments about Denso SKJ20DR-M11 Iridium Long Life Spark Plug:

      Great OEM product

      Comment on this reviewHelp Icon

      (0 of 2 customers found this review helpful)

       
      5.0

      Great Plugs

      By 

      from VIRGINIA

      About Me Auto Enthusiast, Casual Driver

      See all my reviews

      Ask me a question

      Verified Buyer

      Pros

      • Durable
      • Improves Engine Efficiency
      • Increases Power

      Cons

        Best Uses

        • Everyday Driving
        • Performance Driving
        • Replacement
        • Restoration

        Comments about Denso SKJ20DR-M11 Iridium Long Life Spark Plug:

        Great plugs. Better then NGK.

        Comment on this reviewHelp Icon

        (3 of 3 customers found this review helpful)

         
        4.0

        Good plugs

        By 

        from Cleveland Ohio

        About Me Auto Enthusiast, Casual Driver

        Verified Buyer
        Helpful Reviewer

        Pros

        • Durable
        • Easy To Install
        • Improves Engine Efficiency
        • Increases Power

        Cons

        • Cost

        Best Uses

        • Everyday Driving
        • Replacement

        Comments about Denso SKJ20DR-M11 Iridium Long Life Spark Plug:

        Great plugs. Long lasting. Gaps were spot on out of the box.

        Comment on this reviewHelp Icon

        (1 of 1 customers found this review helpful)

         
        5.0

        Worked great on Acura TSX 2006

        By 

        from NY, NY

        Verified Buyer

        Comments about Denso SKJ20DR-M11 Iridium Long Life Spark Plug:

        Did the job.

        Comment on this reviewHelp Icon

         
        5.0

        Great plug

        By 

        from Maine

        About Me Mechanic

        Verified Buyer

        Pros

        • Durable
        • Improves Engine Efficiency
        • Increases Power

        Cons

          Best Uses

          • Everyday Driving

          Comments about Denso SKJ20DR-M11 Iridium Long Life Spark Plug:

          Much better throttle response in my 2005 Tacoma. Quicker starting.

          Comment on this reviewHelp Icon

          Displaying reviews 1-8

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          Do you have questions about this product?

           

          Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

          5 Questions | 5 Answers
          Displaying questions 1-5
          • Q:

            does this plug have an oem 100k mile service life?
            Asked on 11/25/2015 by jeff from United States

            1 answer

            • CUSTOMER CARE

              A:

              Hi Jeff, I'm glad to assist you. This Denso SKJ20DR-M11 Iridium Long Life Spark Plug (Part No. 3377) has a lifespan over 3x longer than conventional spark plugs. The Iridium Long Life is the perfect OE replacement for today's modern vehicles. The OEM Manual says it must be replaced after 105k miles.

              Answered on 11/26/2015 by Solomon from AAP
          • Q:

            Do I need anti-seize lubricant to install these?
            Asked on 7/4/2015 by Cam from Virginia Beach, VA

            1 answer

            • CUSTOMER CARE

              A:

              Hi Cam, good question! Anti-seize lubricant is not mandatory. You can check the gap and install them.

              Answered on 7/5/2015 by Steve from AAP
          • Q:

            is this plug pre gapped
            Asked on 9/5/2012 by Butch from Cocoa fl.

            1 answer

            • CUSTOMER CARE

              A:

              A spark plug part number might fit hundreds of different engines from many different manufacturers. Although the spark plug from the factory will come with a gap to a pre-selected setting, this may not be the right gap for your particular engine. The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy, and accelerated plug wear. It is always best to check the gap against the manufacturer's specifications. If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. The gap should be adjusted by only moving the ground electrode.
              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 9/5/2012 by Aaron from AAP
          • Q:

            Is it worth buying?

            As compared to a regular spark plug?
            Asked on 2/11/2011 by Anonymous

            1 answer

            • CUSTOMER CARE

              A:

              I would suggest you to check the requirements for your vehicle before buying this part.

              Answered on 3/7/2011 by David the Dynamite Parts Guy from AAP
          • Q:

            How many spark plugs i need to buy for my honda accord lx 2005 (4 or 6)?
            Asked on 6/8/2010 by Anonymous

            1 answer

            • CUSTOMER CARE

              A:

              This vehicle came with both a V6 and 4 cylinder engine. If it is a 4 cylinder you need 4 spark plugs. If it is a V6 you need 6 spark plugs.

              Answered on 6/8/2010 by Kevin from AAP
          Displaying questions 1-5

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