E3 Spark Plugs E3.40 Premium Automotive Spark Plug with DiamondFIRE Technology, Pack of 1 Spark Plug
- Brand:
- E3
- Model Number:
- E3.40
- UPC:
- 894489000404
- EAN:
- 0894489000404
- ASIN:
- B000BPOI98
- Walmart SKU:
- 146655918
Key Takeaway
Price momentum shifted downward , bringing the cost to $8.49. This represents a 0.0% discount to typical levels.
Third-Party Seller Summary
| Price Type | Price | Date |
|---|---|---|
|
Highest Price
|
$11.09 | |
|
Lowest Price
|
$8.49 | |
|
Most Recent Price
|
$8.49 |
- Average Price
- $9.53
- First Tracked
- Last Update
Walmart.com Summary
| Price Type | Price | Date |
|---|---|---|
|
Highest Price
|
$9.56 | |
|
Lowest Price
|
$7.48 | |
|
Most Recent Price
|
$8.49 |
- Average Price
- $8.40
- First Tracked
- Last Update
Price Analysis
Tracking History: We have tracked E3 Spark Plugs E3.40 Premium Automotive Spark Plug with DiamondFIRE Technology, Pack of 1 Spark Plug since 1/22/2026. The most recent price update was on Sep 9, 2026.
Price Range: Over the past 90 days, the price has ranged from $7.48 (lowest on 3/23/2026) to $9.56 (highest on 1/24/2026). The average price during this period is $8.40.
Current Trend: Walmart.com prices have ranged from $8.49 (Sep 9) to $8.49 (Sep 9) over the past 90 days. Current price is close to the 90-day average of $8.49.
Customer Insights: Rated 4.8/5 from 291 reviews.
Customer Reviews
291 reviewsCustomer Reviews
4.8
Based on 291 reviews
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Showing 10 of 291 reviews
The only "pre-gapped" (officially) plugs.
[This review was collected as part of a promotion.] That's right. The only pre-gapped plugs. So far they are exceptional with a quicker start time as they seem to be able to fire on less fuel mixture in cylinder. Also same with outdoor power equipment plugs!
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E3 48 Installation Acura 3.0L
[This review was collected as part of a promotion.] Start up is now immediate. Smoother idle and the "Go fast" pedal works much better. The benefit of these plugs outweighs the cost. Get them.
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In my opinion, best plugs on the market
[This review was collected as part of a promotion.] I use E3 plugs and all my vehicles. Best plugs on the market. They improved gas mileage, and they lasted longer than any other plug that I've had.
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My Go To
[This review was collected as part of a promotion.] E3 spark plugs have been my go to. No issues, always working as intended/described. Impala, Sierra and now will be using them in my Tahoe, I have always found the performance to be where it should be. Without having to gap anything, its always a nice fit.
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E3 spark plugs are excellent.
[This review was collected as part of a promotion.] I recently purchased E3 spark plugs for my 2014 3.7L Mustang and noticed an immediate improvement in running and mileage so I also replaced the plugs in my 1977 Pontiac CanAm 455 V8 and the difference in cold start, idle and at speed was remarkable. Highly recommended!
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Upgrade your plugs to E3
[This review was collected as part of a promotion.] Great plugs - work better than OEM. Great throttle response.
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E3 spark plugs
[This review was collected as part of a promotion.] I run e3 in all my vehicles better performance and mileage
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The larger gap was exactly what I needed.
[This review was collected as part of a promotion.] The extra sized gap was exactly what I needed with a higher compression engine and a MSD ignition. Now it fires up immediately and my AFR is staying steadier than before.
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Perfect for performance of any machine
[This review was collected as part of a promotion.] Best spark plugs I have ever bought ! I have purchased these for everything I own that they currently make them for.
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Awesome plugs!!
I've been wanting to grab a set of these for my boat..... Got a Yamaha VMAX on my Skeeter... And they work awesome!! I can definitely tell a difference in how it runs!! Thank you so much for all your help and picking me a set to fit my outboard!!
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Price History
Recent Price Changes
Detailed price history for the past 90 days
Walmart.com Pricing
6 recordsWalmart.com prices have ranged from $8.49 (Sep 9) to $8.49 (Sep 9) over the past 90 days. Current price is close to the 90-day average of $8.49.
| Date | Price | Change | % Change |
|---|---|---|---|
| $8.49 | $+0.00 | +0.0% | |
| $8.49 | $+0.00 | +0.0% | |
| $8.49 | $+0.00 | +0.0% | |
| $8.49 | $+0.00 | +0.0% | |
| $8.49 | $+0.00 | +0.0% | |
| $8.49 | — | — |
No third-party seller price history available for this product in the past 90 days.