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E3.36 Spark Plug

SKU # E3.36
$ 6.49

Motorcycle spark plug that fits a variety of powersport applications.


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E3.36 is a 12mm, 0.750” reach plug with a gasket seat. It is used in a variety of powersport applications, and is often the correct plug for V-Twin motorcycle engines. Most late model Harley Davidson engines require E3.36. The patented DiamondFIRE ground electrode is secured to the shell with two legs to help facilitate heat transfer, and to withstand the intense vibration of powersport engine applications. The unique DiamondFIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use. The E3 ground electrode and full-size center electrode also provides optimal performance over an extended product life.




Part Number: E3.36

Resistor: Resistor

Hex Size: 5/8"

Thread Reach: 0.750"

Thread Diameter: 12mm

Seat: Gasket

Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted

Write a review

Reviewed by Kenneth Fredericks
05/03/2022 12:39 pm
Just installed these in my 2005 harley with a beast of a costume motor 10-1 compression, ported, polished it was fast before but now it’s even quicker! Going to be putting these in all of my other 3 bikes.Thanks E3

Reviewed by Mark Friedman
04/13/2021 8:56 am
E3 3.36 Harley Davidson Sportster
Noticed immediate improvement in power over standard champion plugs! Very pleased ! I was skeptical at first thinking they were just another gimmick product but I was very surprised!
Thank you and I will use E3 in my other vehicles as well as recommend to friends and customers!
Thank you!

Reviewed by noah king
02/25/2019 2:58 pm
2004 Foreman 450
Love the E3 plugs on my foreman! Gives it alot better throttle response than the plugs i had from autozone! Will always use these now!

Reviewed by Jonathan Detrinidad
12/31/2018 12:49 pm
My Harley will only ever use e3 plugs from now on!
I recently installed a set of e3.36 spark plugs on my 2002 sportster 1200 Custom and the difference is night and day! acceleration has become incredibly smoother, i've been getting more miles in between fill ups, and you can feel a significant increase in power; great price for a great product.