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Denso SK20HR11 Iridium Long Life Spark Plug
See if this part fits a specific vehicle.
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 |
| Resistor: | Yes |
| Spark Plug Reach: | 1.04 in |
| Spark Plug Seat Type: | Gasket |
| Spark Plug Thread Size: | 14 mm |
| Tip Configuration: | 0.7mm Iridium |
| Type: | Iridium Long Life |
| Wrench Diameter: | 5/8 in |
REVIEW SNAPSHOT®
by PowerReviewsDensoSK20HR11 Iridium Long Life Spark Plug
(based on 10 reviews)
Ratings Distribution
100%
of respondents would recommend this to a friend.
Pros
- Improves engine efficiency (7)
- Easy to install (6)
- Increases power (5)
Cons
Best Uses
- Everyday driving (7)
- Replacement (7)
- Performance driving (4)
- Car & Truck:
- Casual driver (3)
- Reviewer Profile:
- Auto enthusiast (3), Truck enthusiast (3)
REVIEWS
Reviewed by 10 customers
Sort by
Displaying reviews 1-10
Pros
- Durable
- Easy To Install
- Improves Engine Efficiency
- Increases Power
Cons
- none
Best Uses
- Everyday Driving
- Performance Driving
- Replacement
Comments about Denso SK20HR11 Iridium Long Life Spark Plug:
Quality product
Pros
- Easy To Install
- Plugs Were Gap Correct
Cons
- No Improvement In Performance
- They Are The Stock Plug
Best Uses
- Replacement
Comments about Denso SK20HR11 Iridium Long Life Spark Plug:
fit as expected
Pros
- Easy To Install
- Improves Engine Efficiency
- Increases Power
Cons
Best Uses
- Performance Driving
- Racing
Comments about Denso SK20HR11 Iridium Long Life Spark Plug:
Not Bad,about the same as my ngk.
Pros
- Easy To Install
Cons
Best Uses
- Everyday Driving
- Replacement
Comments about Denso SK20HR11 Iridium Long Life Spark Plug:
I replaced the plugs on my tundra, heard many times that Tundras love the Denso brand plugs,
which half of the plugs were OE, easy replacement, and they are long reach as specified by a label on the valve cover. No significant improvement after
24 days driving on them, but perhaps the extra 20-24 miles per gas tank was the replacement of plugs, who knows, its only the 1st tank full. Seems to do its job no negative effects known to me. Price is good in comparison with the other Japanese brand of NGK iridiums.
Pros
- Improves Engine Efficiency
- LONG LASTING
Cons
- Expensive
Best Uses
- Everyday Driving
- Replacement
- Tune-up
Comments about Denso SK20HR11 Iridium Long Life Spark Plug:
Expensive replacement plugs. However, if you only have to replace them every 100K miles, they might be worth it.
Pros
- Easy To Install
- Improves Engine Efficiency
Cons
Best Uses
- Everyday Driving
- Performance Driving
Comments about Denso SK20HR11 Iridium Long Life Spark Plug:
Truck was starting to run a little rough with 100K on the odometer. Decided to try new plugs and these were the OEM plugs. Install was straight forward and now the truck runs smooth again and I feel sure that it will improve the efficiency back to near new results.
Pros
- Improves Engine Efficiency
- Increases Power
Cons
Best Uses
- Everyday Driving
- Replacement
Comments about Denso SK20HR11 Iridium Long Life Spark Plug:
did not think I would need plugs at 30K but that what was recomended by the book and I followed, could see the rpm gauge go up about 200 rpm at idle speeds did not notice before the new plugs. I glad I did improved gas milage about 1/2 mile per gallon not much but again I saw the difference.
- Car & Truck:
- Casual Driver
Pros
- Increases Power
Cons
Best Uses
Comments about Denso SK20HR11 Iridium Long Life Spark Plug:
I can tell thats these plugs improved my towing, gave me about 1 mpg better fuel mileage while towing. I'm glad I switched to these
- Car & Truck:
- Casual Driver
Pros
- Improves Engine Efficiency
Cons
Best Uses
- Everyday Driving
- Replacement
Comments about Denso SK20HR11 Iridium Long Life Spark Plug:
Installed them in my 2008 Tundra. I had purchased IKH20 plugs which lowered my Gas mileage so I went back with these. I am anxious to see if I will get my old MPG back. [...]
- Car & Truck:
- Truck Enthusiast
Pros
- Easy To Install
- Improves Engine Efficiency
- Increases Power
Cons
Best Uses
- Everyday Driving
- Performance Driving
- Replacement
Comments about Denso SK20HR11 Iridium Long Life Spark Plug:
Easy to install, all plugs were pre-gapped. The overall improvement was amazing, like driving the truck when it was brand new.Maybe even better than brand new I don't recall the truck having this kind of acceleration. Don't know about gas mileage yet.
Worth every penny.
- Car & Truck:
- 2005 Tacoma 40 V6, Auto Enthusiast, Casual Driver, Truck Enthusiast
Displaying reviews 1-10
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.
5 Questions | 5 Answers
Displaying questions 1-5
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, GA1 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 pig1 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 Mauritius1 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 4runnerAsked on 6/30/2012 by Joe1 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
Q:
I own a 2007 Volvo s40 2.4 and would like to replace the old spark plugs with the Denso SK20HR11 plugs. I noticed that the plugs come pre-gapped. I looked in an aftermarket repair manual which does not specify what the gap should be for my particular car. Could you check to see what the correct gap should be for my specific vehicle? No modifications have been made to my car (all OEM).Asked on 4/11/2012 by Anonymous1 answer
CUSTOMER CARE
A:
Yes, this part Denso SK20HR11 Iridium Long Life Spark Plug, Part No. 3421 manufactured by Denso fits your 2007 Volvo S40 2.4I. The spark plug gap for your particular car ( VIN: B5244S4 as well as VIN: B5244S7) should be Gap: 0.032''.Answered on 4/12/2012 by Aaron from AAP
Displaying questions 1-5
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