

⚡ Ignite your engine’s full potential with DiamondFIRE precision!
The E3.109 Premium Racing Spark Plug features patented DiamondFIRE technology with a dual-leg ground electrode for superior heat transfer and faster flame propagation. Designed with a 14mm thread, 0.708” reach, and 5/8” hex taper seat, it delivers enhanced power, improved fuel efficiency, and reduced emissions. Compatible with major spark plug brands and built for high-RPM racing applications, it offers durability backed by a limited lifetime warranty.
| ASIN | B01JLYM1D4 |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #1,266,032 in Automotive ( See Top 100 in Automotive ) #2,051 in Automotive Replacement Spark Plug Wires #6,484 in Automotive Replacement Spark Plugs |
| Brand | E3 |
| Core Material | Copper |
| Customer Reviews | 4.2 4.2 out of 5 stars (62) |
| Date First Available | August 3, 2016 |
| Exterior | Machined |
| Global Trade Identification Number | 00894489000053 |
| Item Weight | 1.6 ounces |
| Item model number | E3.109 |
| Manufacturer | E3 Spark Plugs |
| Manufacturer Part Number | E3.109 |
| Model | E3 Race Spark Plug |
| OEM Part Number | E3.109 |
| Product Dimensions | 1 x 4 x 6 inches |
| Thread Size | 14mm |
| Top Material Type | Copper |
| UPC | 894489000053 |
| Vehicle Service Type | Racing Vehicle |
M**E
Use the E3 spark plug
I've been a mechanic since 1975, what people don't understand is that they don't have to put the spark plus that they call for in your lawnmower. I use the E3 plug. My lawnmower starts easy an I use less gas. Clean the plug an it will last a long time.
R**E
Good spark
Good plugs, gave me 10 more hp and good gas mileage
G**P
I have a cold air intake on the journey and also a performance chip
Work very well w cold air intake and a performance chip added about 50 more hourse power
A**T
7 out of 8
i ordered 8 plugs and only 7 in the package
C**L
Must work
Car is running much better now
R**.
Low cost high value
I really could tell a difference… I mean not a crazy difference.. but my hawk 250 definitely ran better with this plug versus the one that came with it… I have also ran it with the iridium plug.. now they do last longer but to me the e3 feels the same performance wise
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