E3.56 Spark Plug

Home > Products > Automotive Spark Plugs > E3.56 Spark Plug
E3.56 Spark Plug
Click to enlarge

More images


ITEM # : E3.56


Automotive plug that fits in a variety of import and domestic applications.




E3.56 is a 14mm, 0.750” reach plug with a gasket seat. It fits a wide variety of late model applications, especially import. 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: E3.56

Resistor: Resistor

Hex Size: 5/8"

Thread Reach: 0.750"

Thread Diameter: 14mm

Seat: Gasket

Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted

Login or Register to write a review.
Reviewed by envaderx
04/27/2017 - 02:14:06 PM
Great Product
I just received these plugs and put them in my 2011 Civic 1.8. I was in the 90k mile range and I've been noticing a gradual decrease in power over time. I put my new plugs in yesterday and instantly noticed a gain in power.

Throttle response is back and the slight delay when I jam on the throttle is gone. I haven't had them in long enough to see if I gain any mpg, but I'm sure I will. I saw these plugs on Horsepower TV years ago when they first came out and they were raving about them. I'm glad I purchased these plugs and I've been talking them up to everyone.

For something you're only going to replace every 100k miles it's worth every penny.

Also HP TV had mentioned a slight HP gain like 2-3hp with these plugs. In a big v8 you probably won't notice it, but in a 4 banger that you use as your daily driver you'll notice the response instantly.
Reviewed by dustinrps12
09/23/2016 - 02:47:10 AM
Amazing Product
I owned a 1985 Toyota Corolla GTS and I was recommended these plugs. I was somewhat skeptical at first, but once they were installed, my mind was completely changed. These plugs are amazing. Better throttle response, increased MPG, and I never had a fouling issue with them. I will run these plugs in everything that I can. Would recommend to anyone.
Reviewed by Jlaud95
09/19/2016 - 03:11:21 PM
Fantadtic Product!
I used these plugs in my 1986 Toyota Mr2 and they worked wonderfully. Right away I noticed more throttle response than with the recommended factory plugs. Also quickly noticed a 4-5 mpg increase in my fuel range. Definitely satisfied with E3 products and will use them in all my future automotive applications.