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NorthEast Cycle Shop
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NorthEast Cycle Shop
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Eligible for Return, Refund or Replacement within 30 days of receipt
Eligible for Return, Refund or Replacement within 30 days of receipt
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Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. You may receive a partial or no refund on used, damaged or materially different returns.
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E3 Spark Plugs E3.81 Premium Automotive Spark Plug w/DiamondFIRE Technology (Pack of 1)

4.3 4.3 out of 5 stars 375 ratings
$6.99
FREE Returns
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Purchase options and add-ons

Brand E3
Core Material Copper
Gap Size 0.04 m/m Kelvin
Top Material Type Alloy Steel
Vehicle Service Type Truck

About this item

  • Automotive spark plug that fits a variety of domestic applications, designed to increase power, reduce fuel consumption, and improve hydrocarbon emissions
  • E3's patented DiamondFIRE edge-to-edge electrode provides maximum performance with increased efficiency, and a faster more complete burn
  • Designed with colder heat ranges to enable performance modifications, and contains Yttrium-enhanced alloy for a reduction in side wire temperature for less pre-ignition
  • Includes one (1) E3.81 spark plug with a limited lifetime warranty
  • Primarily used in a wide variety of automotive and truck applications
  • Fit type: Vehicle Specific
› See more product details

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Frequently bought together

E3 Spark Plugs E3.81 Premium Automotive Spark Plug w/DiamondFIRE Technology (Pack of 1)
$6.99
Only 18 left in stock - order soon.
Ships from and sold by NorthEast Cycle Shop.
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Product Description

The E3.81 auto spark plug is a 12mm, 1.000” reach plug with a gasket seat. It fits a wide variety of late model applications, especially import. E3.81 has two legs securing the DiamondFIRE electrode to the shell. This allows for excellent heat transfer, and helps to create more turbulence in the cylinder. The patented DiamondFIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use. The unique ground electrode and full-size center electrode also provides optimal performance for a guaranteed five years or 100,000 miles. Part Number: E3.81; Resistor: Resistor; Hex Size: 9/16"; Thread Reach: 1.000"; Thread Diameter: 12mm; Seat: Gasket; Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted. Our unique DiamondFIRE open design forces air gap discharges, creating the preferred edge-to-edge spark path. The design allows replenishment of the spark zone with a fresh fuel/air charge, and exposes the flame front more directly to the piston head than other plug designs. This distinctive spark plug design has proven to simultaneously increase engine power output, reduce gasoline consumption, decrease hydrocarbon and carbon monoxide emissions from the engine, and materially extend the life of the spark plug. Our lawn and garden spark plugs help engines operate more efficiently with a faster and smoother acceleration.

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Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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E3 Spark Plugs E3.81 Premium Automotive Spark Plug w/DiamondFIRE Technology (Pack of 1)

E3 Spark Plugs E3.81 Premium Automotive Spark Plug w/DiamondFIRE Technology (Pack of 1)

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What's in the box

  • (1) Automotive Spark Plug

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    Price$6.99$6.35$24.81$10.74-25% $6.56
    List: $8.79    		$8.82
    Delivery
    —
    Get it as soon as Sunday, May 19
    Get it May 17 - 21
    Get it May 16 - 20
    Get it as soon as Sunday, May 19
    Get it as soon as Sunday, May 19
    Customer Ratings
    4.34.3 out of 5 stars375
    4.04.0 out of 5 stars47
    4.54.5 out of 5 stars84
    4.94.9 out of 5 stars10
    4.44.4 out of 5 stars92
    4.24.2 out of 5 stars286
    Value for money
    3.7
    4.0
    4.5
    —
    3.7
    3.9
    Mileage
    3.4
    4.0
    4.4
    —
    3.7
    3.8
    Longevity
    2.7
    4.0
    —
    —
    —
    3.6
    Sold By
    NorthEast Cycle Shop
    Amazon.com
    ZillaZon ✅🏆⭐Authorized
    Sixity Auto
    Amazon.com
    Amazon.com
    number of items
    1
    1
    —
    1
    1
    1
    gap size
    0.04 meters per meters kelvin
    0.03 meters per meters kelvin
    —
    —
    —
    0.04 inches
    core material
    Copper
    Copper
    Copper
    Iridium
    Iridium
    Copper
    top material
    Alloy Steel
    —
    —
    —
    Nickel
    Alloy Steel

    Looking for specific info?

    Customer reviews

    4.3 out of 5 stars
    4.3 out of 5
    375 global ratings

    Customers say

    Customers like the smoothness and efficiency of the spark plug. For example, they mention that their vehicles run smoother, idle better, and get better gas mileage. That said, opinions are mixed on value and performance.

    AI-generated from the text of customer reviews

    8 customers mention6 positive2 negative

    Customers like the smoothness of the spark plug. They mention that their vehicles run smoother, idle better, and perform with much greater acceleration and fuel efficiency.

    "...These were installed and the vehicle performed with much greater accelerationand fuel efficiency as in my 2004 Toyota Corolla...." Read more

    "...But it is the smooth acceleration that the plugs give to my little 4-cylinder engine that makes me smile every time I pass someone by." Read more

    "When I first installed these plugs the car stalled a few times and I was concerned...." Read more

    "Vehicles run smoother thats all ill say about them other stuff to minuscule to report that Oh yeah there great." Read more

    3 customers mention3 positive0 negative

    Customers are satisfied with the efficiency of the spark plug. For example, they mention it improves fuel efficiency, and it gets better gas mileage.

    "...and fuel efficiency as in my 2004 Toyota Corolla. I have recommended these to friends and they all say the same thing.Thank You E3!" Read more

    "...it runs great now and the engine appears to run stronger with improved fuel economy" Read more

    "...my 2010 Altima and what a difference they made smoother idle and better gas mileage I have 232455 miles and adding every day" Read more

    10 customers mention6 positive4 negative

    Customers are mixed about the value of the spark plug. Some are happy with the price and the product so far, while others say it's not worth it and does not live up to its billing.

    "Great price. They seem to be working great. Pleasantly surprised. Would buy again." Read more

    "Total junk and a waste of money on my 2017 Mazda 3. The car started idling poorly at 7-8 months usage and maybe 10,000 miles...." Read more

    "Very happy with the price and the product so far" Read more

    "...2k miles and engine started misfiring from idle to 3500rpm .... Complete garbage!!!" Read more

    9 customers mention4 positive5 negative

    Customers are mixed about the performance of the spark plug. Some mention that it works well and provides an improvement in performance, while others say that it causes gradual engine misfires and drops MPG significantly.

    "...couple of weeks, so far so good and I can definitely see an improvement in performance." Read more

    "...Engine code of misfire on cylinder 1, and the engine was vibrating from missfire. It practically stalled on me at one point...." Read more

    "worked perfectly-- easy install very pleased" Read more

    "...Gradual engine misfires. Eventually got really bad and now I’m looking at a $275 spark plug replacement...." Read more

    LA PEOR COMPRA
    1 Star
    LA PEOR COMPRA
    Tengo un toyota corolla 2015,le hice el mantenimiento correspondiente, el auto estaba en perfecto estado ,vi estas bujías y creí serian una buena opción, hice el cambio y a los días note un cambio en mi auto ,no desarrollaba velocidad y se consumía la gasolina muy rápido creí seria cualquier otra cosa menos las bujías, gaste dinero en ir al mecánico reviso con el scaner el vehículo y no arrojo ningún código reviso las bujías y ohhh sorpresa !!! Las bujías con menos de un mes puestas estaban oxidadas quemadas ,comore otras bujías deje pasar unos días y todo marcha 3xcelente definitivamente no recomiendo estas bujías son de pésima calidad la peor compra
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    Top reviews from the United States

    Translate all reviews to English
    Elmer F. Bartgen
    5.0 out of 5 stars These are a Great addition
    Reviewed in the United States on August 21, 2023
    Verified Purchase
    My vehicle is a 2020 Toyota Rav 4 XLE . These were installed and the vehicle performed with much greater acceleration
    and fuel efficiency as in my 2004 Toyota Corolla. I have recommended these to friends and they all say the same thing.
    Thank You E3!
    Helpful
     Report
    steve haskin
    5.0 out of 5 stars Quality product
    Reviewed in the United States on January 3, 2020
    Verified Purchase
    When I first installed these plugs the car stalled a few times and I was concerned. But after the car electronics adjusted it runs great now and the engine appears to run stronger with improved fuel economy
    2 people found this helpful
    Helpful
     Report
    Rodrigo M.
    5.0 out of 5 stars Bien
    Reviewed in the United States on September 8, 2023
    Verified Purchase
    Funcionan muy bien.
    Helpful
     Report
    G.Kaplan
    1.0 out of 5 stars Miss-fire after 8 months.
    Reviewed in the United States on February 6, 2022
    Verified Purchase
    Total junk and a waste of money on my 2017 Mazda 3. The car started idling poorly at 7-8 months usage and maybe 10,000 miles. Engine code of misfire on cylinder 1, and the engine was vibrating from missfire. It practically stalled on me at one point.

    I replaced all 4 plugs with the originals that had 50K miles on them, and the problem immediately went away.

    IMO these plugs are hit/miss depending on the car. A different model seems to be fine on my 2010 Toyota Yaris. The Mazda was a complete miss.

    Never had plug issues like this before in 30 years of car ownership, and I won't be buying this brand again.
    One person found this helpful
    Helpful
     Report
    Fernando Rivas
    4.0 out of 5 stars Powerful in first place but doesn’t last
    Reviewed in the United States on February 21, 2020
    What an amazing power feel in first place when spark plug was fresh. It got the power! After the spark plug slowly lose performance after 3,467 miles and it still running but doesn’t last long. Don’t know when Spark Plug will miss fire but it’s good for high performance at the short time. But the fuel doesn’t save as much as it is. It just throwing all power in burn it quick.
    Customer image
    Fernando Rivas
    4.0 out of 5 stars Powerful in first place but doesn’t last
    Reviewed in the United States on February 21, 2020
    What an amazing power feel in first place when spark plug was fresh. It got the power! After the spark plug slowly lose performance after 3,467 miles and it still running but doesn’t last long. Don’t know when Spark Plug will miss fire but it’s good for high performance at the short time. But the fuel doesn’t save as much as it is. It just throwing all power in burn it quick.
    Images in this review
    Customer image
    Customer image
    2 people found this helpful
    Helpful
     Report
    Amazon Customer
    5.0 out of 5 stars E3 in an Altima
    Reviewed in the United States on June 5, 2020
    Verified Purchase
    I normally do not install non-oem plugs in anything. Previously, anytime I did I had to replace them in a short amount of time. Because the OEM plugs for my wife's 2013 Altima are next to impossible to find, I decided to try the E3s. Although it's only been a couple of weeks, so far so good and I can definitely see an improvement in performance.
    7 people found this helpful
    Helpful
     Report
    mooneys opinion
    5.0 out of 5 stars Smooth and Powerful
    Reviewed in the United States on June 9, 2022
    Verified Purchase
    I am getting a slightly less than 10% increase in mileage with these, which is great with gas at these high prices. But it is the smooth acceleration that the plugs give to my little 4-cylinder engine that makes me smile every time I pass someone by.
    Helpful
     Report
    Kenneth fox
    5.0 out of 5 stars Good product
    Reviewed in the United States on July 20, 2021
    Verified Purchase
    Great price. They seem to be working great. Pleasantly surprised. Would buy again.
    Helpful
     Report

    Top reviews from other countries

    Translate all reviews to English
    Faheem Chaudhry
    5.0 out of 5 stars Excellent Product
    Reviewed in Canada on September 23, 2023
    Verified Purchase
    Value for the money 💰
    Report
    Ahmed Hussein
    5.0 out of 5 stars works as advertised
    Reviewed in Canada on April 16, 2021
    Verified Purchase
    I installed these on my 2015 Nissan Altima, and so far it works great
    Report
    sebastien
    1.0 out of 5 stars Non compatible avec 2.5l nissan
    Reviewed in Canada on July 7, 2020
    Verified Purchase
    Nom compatible avec le.2.5l de la nissan altima.2016
    One person found this helpful
     Report