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1205 E Main St
Columbus, OH 43205
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DENSO Iridium Long-Life Spark Plug: OE Performance, last 100K+ Miles, SKJ20DR-M11

Part # 3377
1 yr replacement if defective
$16.49
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Product Information

Product Details
Part No. 3377
Warranty Details (1 YR REPLACEMENT IF DEFECTIVE)
Manufactured to the strictest OE performance, durability and emissions standards.

Product Features:
  • Latest OE technology with DENSO's patented Iridium Alloy (90% Ir) and fine wire center electrode
  • Platinum ground electrode for extended life
  • DENSO Patented 360 degree laser welding process: Ensuring exceptional quality bond and structural strength with the Iridium Center Electrode
  • Sustained spark performance over 100,000 miles
  • Lasts up to three times as long as conventional plugs
  • Endures extreme temperatures greater than 4,000 degrees F associated with high-performance ignition and special fuel systems
  • Iridium Long Life
  • Enhanced Engine Performance: Enjoy more horsepower, faster and easier starts, and fewer misfires under heavy loads, thanks to the advanced design and materials used in the DENSO Iridium Long Life plug.
  • Fuel Efficiency: This spark plug not only boosts engine performance but also helps in better conservation of fuel, making it an economical choice for long-term use.
Specifications
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

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4.82 out of 5
740 Customer Reviews
94% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
669
4 Stars
41
3 Stars
12
2 Stars
2
1 Star
16
Lexus is350 PlugsYou get what you pay forI would buy it again, 100% sure
I would buy it again, 100% sureI would buy it again, 100% sureDoes not fit acura RL with 3.7 engineWorth the money!Denso OE Replacement plugs, 3444
Pros
48
Improves Engine Efficiency
42
Easy To Install
39
Durable
39
Increases Power
9
Lightweight
Cons
8
none
6
No Improvement In Performance
3
Pricey / Poor Value
1
Cost
1
Difficult To Install
Best Uses
61
Everyday Driving
47
Replacement
25
Performance Driving
9
Restoration
6
Racing
Car & Truck
8
Casual Driver
3
Auto Enthusiast
2
Truck Enthusiast
1
Competitive Driver
1
Shadetree Mechanic
Describe Yourself
33
Casual Driver
28
Auto Enthusiast
17
Mechanic
6
Truck Enthusiast
4
Competitive Driver
Most Liked Positive Review
Incorrect plug
I entered my car 2000 Infiniti I30 with 3.0 V6 to look for spark plugs. A spark plug that is incorrect for my car is shown on your site stating its correct for this car. It is Denso SK16PR-L11. The correct plug shown on Denso's site is Denso SK20PR-L11. The difference is the 16 in the number witch is the heat range. A 16 installed could in fact due major internal damage to my engine including burning a hole in the piston if the cars driven on a very long road trip and since they can be installed for yrs and up to 100,000 miles these days it eventually will take its toll on an engine. It is a hot plug and not the original heat range plug for this car. Please visit Denso's site and update your plug info. Thank you
Most Liked Negative Review
Never Buy These Plugs
I purchased 8 of these a little over a year ago for my Honda Insight and they have been a nightmare. The engine started missing after awhile so I checked the "new" plugs and found that cylinder #3 plug anode was missing! OMG,that means it went through the engine. I replaced it and ordered new Honda plugs. Before I could put the new Honda plugs in Two more of the DENSO plugs failed the same way, anode fell off in the engine. Bad news for me is that after replacing the defective plugs the engine is still missing on cylinder #2, so this means that something else is damaged. See the picture.
Reviewed by 740 Customers
Product worked as I instructed
Submitted 10 days ago
YAMI IS THE BEST IN CUSTOMER SERVICE! PLEASE GIVE THIS WOMAN A RAISE PLEEEEEASE!
Bottom Line Yes, I would recommend to a friend
I would buy this product again.
Submitted a month ago
DENSO IRIDIUM LONG-LIFE SPARK PLUG, my Jeep runs smoothly and gets better gas mileage.
Bottom Line Yes, I would recommend to a friend
A plug for a plug.
Submitted a month ago
Bought in conjuction with a coil replacement. Coil fixed the misfire. A great spare plug!
Bottom Line Yes, I would recommend to a friend
First time for my truck
Submitted 2 months ago
I'll see for the next change if the spark plugs works Good or Not
Pure Junk!!!
Submitted 3 months ago
I have been a mechanic for 40 plus years and I have never had a problem like this out of the box. The ceramic around the electrode was broken off up in the center of the spark plug core because of this the ceramic kept falling down and shorting out the plug. When I gapped the spark plug it looked fine but as soon as I ran the car for a minute it began to misfire. When I removed the spark plug it looked fine until I notice the ceramic fall down around the core as i turned it upright. It was very frustrating and I had to go back to get a replacement and no I did not drop the plug either lol
Bottom Line No, I would not recommend to a friend
Displaying Reviews 1 - 5Back to Top

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Is this the exact true oem plug for 2012 Honda Civic Sedan LX 1.8 or is the NGK DILZKR7B11GS? And what is the difference or benefits between the 2 types?
Verified Reply - Solomon
Yes Roger, this DENSO Iridium Long-Life Spark Plug (Part # 3483) will fit your 2012 Honda Civic LX 1.8L and it has a heat range of 22 and torque specs cast iron of 11-18 lb. ft aluminum: 11-18 lb. ft. This NGK DILZKR7B11GS has a heat range of 7 and the cast iron 10.8-18 lb. ft. aluminum 10.8-14.5 lb. ft. For more information, please feel free to call us at: 1-877-ADVANCE (238-2623) or contact our "Live Chat" support and one of our Parts Pros will gladly assist you with any questions or concerns you may have.
What's the plug gap in my 2016 Toyota rav4 2.5
Verified Reply - John the Car-Doc
Hi John, I'm glad to assist you! This DENSO Iridium Long-Life Spark Plug: OE Performance, last 100K+ Miles, SK16HR11 - Part # 3417 is pre-gapped at 0.043"-inch (1.1mm) from the factory for your 2016 Toyota RAV4 2.5L.
How many spark plugs come included with the DENSO Iridium brand? this is for my 2014 hyundai elantra. it says this is an exact part match
Verified Reply - John the Car-Doc
Hi Steven, I'm glad to assist you! This DENSO Iridium Long-Life Spark Plug: OE Performance, last 100K+ Miles, SXU22HCR11S - Part # 3461 is sold individually and you'll require 4 of these for spark plugs for your 2014 Hyundai Elantra.
What's the so product number on the item?
Verified Reply - John the Car-Doc
Hi Chris, I'm glad to assist you! The DENSO's SKU number of this Iridium Long-Life Spark Plug - Part # 3457 is FXE24HR-11. To check compatibility, please provide your vehicle's year, make, model, and engine size, so I can assist you further.
What socket size is needed?
Verified Reply - John the Car-Doc
Hi Ashley, I'm glad to assist you! This DENSO Iridium Long-Life Spark Plug FXE20HE11C - Part # 3490 will require a 9/16"-inch (14mm) hex socket.
Displaying Question & Answer 1-5

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