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E3.54 Spark Plug

SKU # E3.54
$ 6.49

Automotive plug that fits in a variety of domestic applications.


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E3.54 is a 14mm, 0.708” reach plug with a taper seat. It fits domestic applications, and is widely available in automotive retail stores. E3 automotive plugs have three 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: E3.54

Resistor: Resistor

Hex Size: 5/8"

Thread Reach: 0.708"

Thread Diameter: 14mm

Seat: Taper

Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted

Write a review

Reviewed by David Pierce
08/06/2022 9:48 pm
2011 Corvette GS Results
I installed a set of E3.54 spark plugs in my 2011 Corvette GS with the 6.2 LS3 . I'm using the OEM coil packs and Taylor Thundervolt 8.2 spark plug wires. The car runs smoother at idle and pulls strong all the way to red line. I didn't do a before/after dyno test so I can't speak to specific horsepower gains but the engine runs great and I haven't experienced any misfires. With the OEM plugs my exhuast tips were always black with carbon residue after a day or two of city driving. After installing the E3 plugs and Taylor wire combination the exhaust tips are staying noticably cleaner and I only wipe them down every couple of weeks and there isn't much residue so it seems that I'm getting a cleaner burn. After 10,000+ miles I'm very pleased with the spark plugs and just ordered a set for our 2013 Cadillac SRX 3.6.

Reviewed by Harold Hart
07/06/2018 5:31 pm
Installed these in my 2007 Chevy Avalanche and couldn't believe the throttle response. As soon as I stepped on the accelerator pedal I felt the difference as the truck jumped forward with a power increase - now that's what a V8 is supposed to feel like. Since then I've installed E3 spark plugs in all my vehicles with similar results. Whenever friends ask what spark plugs I recommend it's always E3 !!!

storyboard E3-54 NEW

storyboard E3-54 NEW