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NGK Laser Iridium Spark Plug (IFR6E11): Fine Wire Tip for Precision
60 day warranty
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Product Information
Product Details
Part No. 6741
Warranty Details (60 Day Warranty)
NGK Laser Iridium spark plugs offer the best combination of performance and longevity. Engineered specifically for OE applications, Laser Iridium spark plugs are tested to the highest standards to ensure quality and durability. Iridium tipped center electrode provides durability six times harder than platinum. NGKs high grade pure alumina ceramic and 98 percent pure copper core prevents the spark plug from overheating while providing reliable starts. Most Laser Iridium spark plugs feature a platinum pad on the ground electrode for even wear in distributorless ignition systems.
Product Features:
Product Features:
- ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction fine wire iridium alloy center electrode provides consistent performance
- IRIDIUM ALLOY CENTER ELECTRODE: Iridium's density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
- PLATINUM TIP GROUND ELECTRODE: Unless OE specified, platinum protection at the ground electrode provides excellent ignitability and service life
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
- RECOMMENDED USAGE: Best for vehicles with OE fine wire iridium alloy plugs
Specifications
Center Electrode Core Material:
Copper
Center Electrode Design:
Fine Wire
Center Electrode Insulator Tip Projection:
0.14 in
Center Electrode Projection:
Mid Projection
Center Electrode Tip Material:
Iridium
Electrical Terminal Type:
Non-Removable Nut
Electrode Core Material:
Iridium
Electrode Tip Material:
Iridium
Gap Size:
0.044 in
Grade Type:
Performance
Ground Configuration:
J-Gap
Ground Electrode Core Material:
Nickel
Ground Electrode Quantity:
1
Ground Electrode Tip Design:
Standard
Ground Electrode Tip Material:
Platinum
Ground Strap Quantity:
1
Hex Size:
5/8" (16mm)
Insulator Height:
1.99 in
Insulator Material:
Ceramic
Manufacturer Heat Range:
6
Pre-Gap Size:
.044 in
Reach:
0.750 in
Resistance:
5000.0 ohm
Resistor:
Yes
Resistor Type:
Yes
Seat Type:
Flat
Shorty Spark Plug:
No
Skirt:
No
Skirt Length:
0.0 in
Thread Diameter:
0.551 in
Thread Size:
M14 - 1.25
Tip Configuration:
Solid
Type:
Iridium/Platinum
Washer Type:
Crush
Washer(s) Included:
Yes
Wrench Diameter:
5/8 in
4.85 out of 5
1774 Customer Reviews
96% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
1619
4 Stars
95
3 Stars
27
2 Stars
9
1 Star
24
Pros
242
Improves Engine Efficiency
232
Easy To Install
190
Increases Power
178
Durable
63
Lightweight
Cons
20
none
10
Difficult To Install
10
No Improvement In Performance
3
Pricey / Poor Value
3
Price
Best Uses
263
Everyday Driving
202
Replacement
121
Performance Driving
39
Restoration
35
Racing
Car & Truck
40
Casual Driver
38
Auto Enthusiast
19
Mechanic
9
Competitive Driver
3
Truck Enthusiast
Describe Yourself
147
Casual Driver
132
Auto Enthusiast
46
Mechanic
22
Competitive Driver
11
Truck Enthusiast
I Am A
2
Single Male
1
Single Female
Most Liked Positive Review
noticeable smoother running
surprised that the originals were also ngk, easy to install. came pregapped but i checked the gap anyway. be careful when checking iridium tips. had a little over 60k and originals were in pretty good shape but dealer was going to replace them anywayat 60k service and i saved price on plugs and labor. did notice smoother idling and engine running. Yeah I did.
Most Liked Negative Review
Be very carefull when you install these plugs
These NGK plugs are original OEM for my Acura which has an aluminum engine block. I installed new NGK plugs at 97k without putting anti-seize compound on the threads. This is how NGK instructs you to install their plugs because there is plating on the threads that breaks loose and makes removing them much easier. NGK tells you not to use anti-seize because it makes the plug go into the block much smoother which confuses the really dumb mechanics so then they over tighten and break the plugs. Also, NGK doesn't want the gobs of anti-seize compound that the dumb mechanic puts all over the threads to ooze onto the firing tip of the plug. If you follow the instructions from NGK when dealing with an aluminum block, then you are doomed to spend 2-3 days with a can of penetrating oil, trying to remove their plugs after 60k. ALL MY PLUGS WERE FROZEN IN THE ALUMINUM ENGINE BLOCK. My advice to you is to learn how to properly apply anti-seize to the threads on the spark plug. And finally, NGK will tell you to warm up an aluminum engine block to make removing their plugs easier. This is a bad idea unless you want the block threads to come out with the plugs which will force you to buy new cylinder heads. Other than that, I have no problems with the spark plug itself.
Reviewed by 1774 Customers
Do not buy for N20 Engine
Installed these in my 2014 328i and they ran very rough. Reinstalled to check my work and had the same result. Reinstalled the factory plugs and it ran as it should. I don't think this is the right plug of the car. I noticed the OEM ones and what is on other sites have an NGK R5 plug, where this is an NGK 1R 8S. They may the wrong temp. for a turbo. Going to try and return to get my money back.
Bottom Line No, I would not recommend to a friend
OE on 2005 Acura TL
Staff Reviewer -
I replaced the original NGK's at 233k miles. I had no significant degradation on performance nor mpg's with the originals. Highly recommended for this particular application. Hoping to get to 300k
Bottom Line Yes, I would recommend to a friend
Stock Replacement
Staff Reviewer -
It is the OEM part - my car came stock with this spark plug. It came gapped correctly and works like the ones that were in there before. These replaced a set with 100k miles and they looked fine. I am sure these will be fine as well. At 200k miles, I will replace them again.
Online ordering was easy and they were ready for local pickup in 45 minutes. I picked them up on my way home from work and installed them on a cold engine the next morning. The old (stock factory) plugs came out fine and these seemed to go in fine. Hopefully they will come out just as easy after 100k.
Bottom Line Yes, I would recommend to a friend
Excellent Product!
Staff Reviewer -
This product was very easy to install and the performance increase was immediate. I'm glad I went with the premium spark plugs!
Bottom Line Yes, I would recommend to a friend
BEST PLUGS FOR IMPORTS!
Verified Buyer -
If you own a Honda/Nissan/Toyota/Acura/even BMW getting NGK spark plugs will most definitely be the best replacements with a guarantee in proper spark plug gaps. Ive seen many many times that owners went with the cheaper ones and found that they have issues after a simple tune up. Cheaper spark plugs are always not properly gapped and cause a load of issues.
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