0
0
×
Account Login
1-800-345-4545
Gift Cards
Track Order
Help Center

E3 Spark Plugs E3 Spark Plug 14mm

368-E3.40


Product Q&A
View Now
Click image to zoom
E3 Spark Plug 14mm
$6.49
$5.51
SAVE $0.98
More than 10 available
E3 Spark Plug
  • Resistor: Resistor
  • Hex Size: 5/8"
  • Thread Reach: 0.460"
  • Thread Diameter: 14mm
  • Seat: Taper
  • Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted
  • 1/pkg
  • Ships
    QTY

    Items You May Also Consider

    Ratings
    Price
    Brand
    E3.40 is rated 4.3 out of 5 by 4.
    Rated 5 out of 5 by from 3rd time over of SUCCESS At one time, I ordered some of these plugs from someone beside Jeg's. They were delivered via USPS, but all losly packed. 3 of them arrived broken. Not so much with Jeg's. I love these plugs, I love their service. Life long fan and customer here for sure.
    Date published: 2018-05-05
    Rated 5 out of 5 by from Perfect! I installed this on a 1971 Mustang 351C M code 3 years ago, made an immediate and noticeable improvement. Burns through slight oil leak, fires hotter and I could feel the added Horsepower. Tried it on a 2004 Buick LaSaber V6 a few years ago did not work as well in it.
    Date published: 2018-04-07
    Rated 5 out of 5 by from Low Cost Upgrade! I have installed these plugs in many vehicles. They have always, always been an upgrade. The main improvement I've noticed is that vehicles have better throttle response off the line and through the bottom end. Some rigs also had a little improvement in gas mileage. They are indeed a low cost upgrade. I always recommend E3s to everyone.
    Date published: 2018-01-20
    Rated 2 out of 5 by from Not that good Purchesed the e3 plugs 2 monthes ago and i have allready went back to my original plug..i feel they dont burn hot enuff
    Date published: 2016-08-28
    • y_2024, m_3, d_17, h_14
    • bvseo_bulk, prod_bvrr, vn_bulk_3.0.38
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_4
    • loc_en_US, sid_10001_10001_325898, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    Do these come pre-gapped? If not how do you gap these?

    Asked by: Project_leviathansbc
    E3 plugs are pre-gapped.
    Answered by: Jegs Tech
    Date published: 2018-03-15

    I have a 1986 Monte Carlo SS with a 305, which I have installed headers. The regular E340 is to long. Do you have a shorter spark plug for this application?

    Asked by: gus86
    Not in the E3 brand of spark plugs, we do have some Accel plugs (111-8198) that are short and for your application.
    Answered by: Rusty B
    Date published: 2020-01-09

    What is the difference from E3 40 and E3 42 ? can I use them in my 1978 454 and my 1994 350 ? are they the same ?.

    Asked by: johnny 77
    The heat range are different. You would want to use the recommended plug per their catalog.
    Answered by: Flanary
    Date published: 2017-08-28
    • y_2024, m_3, d_17, h_14CST
    • bvseo_bulk, prod_bvqa, vn_bulk_3.0.38
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_3
    • loc_en_US, sid_10001_10001_325898, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    Items You Need

    Recently Viewed

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.

    Tools:

    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.