SK20HR11 Iridium Long Life Spark Plug
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Denso SK20HR11 Iridium Long Life Spark Plug

Part No. 3421 Warranty Details  
$9.09
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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:1.04 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
DensoSK20HR11 Iridium Long Life Spark Plug
 
4.6

(based on 31 reviews)

Ratings Distribution

  • 5 Stars

     

    (23)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (3)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

96%

of respondents would recommend this to a friend.

Pros

  • Easy to install (15)
  • Improves engine efficiency (14)
  • Increases power (9)
  • Durable (6)

Cons

  • No improvement in performance (4)

Best Uses

  • Replacement (17)
  • Everyday driving (16)
  • Performance driving (6)
    • Car & Truck:
    • Casual driver (3)
    • Reviewer Profile:
    • Auto enthusiast (7), Casual driver (7), Truck enthusiast (5), Mechanic (4)
    • Was this a gift?:
    • No (3)

Most Liked Positive Review

 

Long Life proper Performance

make sure you use anti seize .this plugs are good for 60K miles plus and you want them to come out after some years. please do no expect that replacing spark plugs on your...Read complete review

make sure you use anti seize .this plugs are good for 60K miles plus and you want them to come out after some years. please do no expect that replacing spark plugs on your Corolla will make it feel like an Avalon and Give you the MPGs of a Prius ,if you replaced the plugs and felt a big difference you probably waited too long

VS

Most Liked Negative Review

 

sk20,hr plugs

Installed in my 2005 Toyota Tacoma 6-cylinder for long life performance. Original plugs were changed with 1 denso coil pack at the same time (131,000 miles). Have not seen any performance...Read complete review

Installed in my 2005 Toyota Tacoma 6-cylinder for long life performance. Original plugs were changed with 1 denso coil pack at the same time (131,000 miles). Have not seen any performance differences.

Reviewed by 31 customers

Displaying reviews 1-10

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5.0

I will but this again.

By 

from undisclosed

See all my reviews

Verified Buyer

Comments about Denso SK20HR11 Iridium Long Life Spark Plug:

Great plugs. Reliable dependable and a good guality product.

 
5.0

What a great plug!

By 

from undisclosed

Verified Buyer

Comments about Denso SK20HR11 Iridium Long Life Spark Plug:

Put the new plugs in the car and seems to idle smoother and start quicker. Now that could be due to the old plugs being so worn.
I will be purchasing these for my other vehicles.

 
5.0

Great Plugs...moderate level of difficulty to install

By 

from undisclosed

Verified Buyer

Comments about Denso SK20HR11 Iridium Long Life Spark Plug:

BMW 325xi runs much better now with improved mpg performance. BMW service interval is not frequent enough for plug replacement.

 
5.0

Good so far

By 

from undisclosed

Verified Buyer

Comments about Denso SK20HR11 Iridium Long Life Spark Plug:

Good so far

 
5.0

Nice

By 

from undisclosed

Verified Buyer

Comments about Denso SK20HR11 Iridium Long Life Spark Plug:

Nice...don't plan on ever having to replace these...

 
5.0

Great spark plugs

By 

from undisclosed

Verified Buyer

Comments about Denso SK20HR11 Iridium Long Life Spark Plug:

Great spark plugs. Super smooth Volvo T5.

 
5.0

Thanks

By 

from undisclosed

Verified Buyer

Comments about Denso SK20HR11 Iridium Long Life Spark Plug:

Great

 
5.0

I would buy again.

By 

from undisclosed

Verified Buyer

Comments about Denso SK20HR11 Iridium Long Life Spark Plug:

These plugs work great.

 
5.0

Factory Replacement

By 

from Parker, CO

Verified Reviewer

Comments about Denso SK20HR11 Iridium Long Life Spark Plug:

A factory replacement plug at a great price. Don't expect to much people they are spark plugs.... not some magical mpg fairy, or a special performance enhancer.

  • Was this a gift?:
  • No

(1 of 1 customers found this review helpful)

 
5.0

Truck runs like new!

By 

from Landolakes, Florida

See all my reviews

Verified Buyer

Pros

  • Good price when ordered online
  • Manufacturers OE
  • Plastic sleeve on plugs for protection in box.
  • Pre gapped (I checked)

Cons

    Best Uses

      Comments about Denso SK20HR11 Iridium Long Life Spark Plug:

      I used to tune my truck up. It runs like new, and on board computer shows a immediate fuel mileage improvement.

      • Was this a gift?:
      • No

      Displaying reviews 1-10

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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.

      11 Questions | 12 Answers
      Displaying questions 1-10Previous | Next »
      • Q:

        is this pre gapped for 2007 Mitsubishi gallant?
        Asked on 3/14/2017 by Matt from harvard il

        1 answer

        • CUSTOMER CARE

          A:

          Hi Matt, glad to assist you! This Denso SK20HR11 Iridium Long Life Spark Plug (Part No. 3421) is an exact fit for your 2007 Mitsubishi Galant and it is pre-gapped at 0.044 inch. Even if the preset gap matches that required by your engine, it is always good practice to physically check the Gap as it may have shifted during transportation.

          Answered on 3/15/2017 by Steve from AAP
      • Q:

        what is the installation torque on this plug utilized on the tundra 5.7 engine
        Asked on 2/24/2017 by viking from NAS Kingsville

        2 answers

        • CUSTOMER CARE

          A:

          Hi Viking, glad to assist you! The recommended torque specifications of this Denso SK20HR11 Iridium Long Life Spark Plug - Part No. 3421 are 26-30 lb-ft on cast iron and 15-22 lb- ft on aluminium.

          Answered on 4/7/2017 by Solomon from AAP
        • CUSTOMER CARE

          A:

          Hi Viking, glad to assist you! The recommended torque specifications of this Denso SK20HR11 Iridium Long Life Spark Plug - Part No. 3421 are 26-30 lb-ft on cast iron and 15-22 lb- ft on aluminium.

          Answered on 4/7/2017 by Solomon from AAP
      • Q:

        Please can I use SK20HR11 for my Pontiac Vibe 2003 model? Thanks
        Asked on 9/20/2016 by James from Ghana

        1 answer

        • CUSTOMER CARE

          A:

          No, this Denso SK20HR11 Iridium Long Life Spark Plug (Part No. 3421) is not an exact fit for your 2003 Pontiac Vibe. We do have an exact Iridium spark plug part available online for your vehicle and the part number is 3324. Please enter your vehicle on our website and search for this part to check the fitment.

          Answered on 9/21/2016 by Steve from AAP
      • Q:

        Do I need to gap these plugs for a 2006 tacoma pre-runner V-6?
        Asked on 7/3/2016 by Jerry

        1 answer

        • CUSTOMER CARE

          A:

          Hi Jerry, glad to assist you! This Denso SK20HR11 Iridium Long Life Spark Plug (Part no. 3421) is an exact fit for your 2006 Toyota Tacoma Pre-Runner V6 engine and it is pre-gapped at 0.044" inch.

          Answered on 7/4/2016 by Steve from AAP
      • Q:

        Is this dual electrode plug? thanks
        Asked on 12/21/2015 by Fran from United States

        1 answer

        • CUSTOMER CARE

          A:

          Hi Fran, I'm glad to assist you. This Denso SK20HR11 Iridium Long Life Spark Plug (Part No. 3421) is not a dual electrode plug.

          Answered on 12/22/2015 by Steve from AAP
      • Q:

        This is a replacement plug for a NGK OEM for my saab 93 AERO V6 2007. Do I adjust the gap to .9mm based on my owners manual reference to the NGK plug that came with my car or do I leave it alone. I am not sure since it is a different plug that I should adjust the gap. Right now the Denso plug has a much wider gap than .9mm.
        Asked on 7/24/2014 by Higgi from Ocala, FL

        1 answer

        • CUSTOMER CARE

          A:

          I'd be happy to help you with that! You should always gap the spark plugs to match your vehicle specifications. These plugs are gapped at 1.1 mm. Even though it is only a 0.2 difference you should gap to meet manufacturer specs for best driveability.

          Answered on 7/29/2014 by Anonymous
      • Q:

        I hav a 2005 Toyota Tacoma Prerunner (1GR-FE) 4.0 V6. The owners manual states that this particular plug is for the (2TR-FE) 2.7 4 cylander. which plug is best for my vehicle?
        Asked on 5/20/2013 by Csm12 from Jackson, GA

        1 answer

        • CUSTOMER CARE

          A:

          This Denso SK20HR11 Iridium Long Life Spark Plug - part# 3421 is an exact fit for your 2005 Toyota Tacoma Pre Runner. 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 5/20/2013 by Vincent from AAP
      • Q:

        I have a 2009 Toyota Tacoma with 4.0L V-6 engine. Will this plug work in my truck?
        Asked on 12/28/2012 by whistle pig

        1 answer

        • CUSTOMER CARE

          A:

          Yes, this Denso SK20HR11 Iridium Long Life Spark Plug - part# 3421 is an exact fit for your 2009 Toyota Tacoma. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.

          Answered on 12/28/2012 by Vincent from AAP
      • Q:

        I have Toyota vitz 2006 model.Is this correct spark plug for that vehicle ?
        Asked on 10/16/2012 by Laxman from Mauritius

        1 answer

        • CUSTOMER CARE

          A:

          Sorry, this Denso SK20HR11 Iridium Long Life Spark Plug - part# 3421 does not fit your 2006 Toyota Vitz. Please check with the Denso K16R-U11 Standard Spark Plug - part# 3120 which is an exact fit for your 2006 Toyota Vitz. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.

          Answered on 10/16/2012 by Vincent from AAP
      • Q:

        are Denso SK20HR11 pre-gapped for 08 Toyota 4runner
        Asked on 6/30/2012 by Joe

        1 answer

        • CUSTOMER CARE

          A:

          This Denso SK20HR11 Iridium Long Life Spark Plug - part# 3421 is pre-gapped for 0.044" and fits only for 2008 Toyota 4Runner with 4.0L V6 engine. For any further assistance, please visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representative there would be more than happy to assist you.

          Answered on 7/2/2012 by Vincent from AAP
      Displaying questions 1-10Previous | Next »

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