E3 Spark Plugs E3.54 Premium Automotive Spark Plug with DiamondFIRE Technology, 14mm Thread Diameter, 0.708” Reach, Taper Seat, Resistor, Pack of 1

Great

The only type of sparkplug that I install on 2000 Chevy 1500 or Chevy 2500 HD, due to the racing plug design that will never foul out backed by 5-year 50,000 mile warranty.

These plugs are something else.. E³ Plugs have performed exceptionally across any make and model I have owned.

I installed a set in my 1987 Bronco II that was having trouble starting on cold mornings. I don't know that there was a noticeable improvement in power, but the cold starts make these worth the extra money.

I put these in another vehicle and realized the results that are advertised. I had studied these for quite some time to make sure that they were worth trying. Turns out they are really good... noticed a slight increase in oomph from the little engine in my Honda, but also noticed better gas mileage (I figure it at each fill-up... went from about 23.3 mpg average to right at 25).

I started using E3 Spark Plugs back in (around) 2005. At that time I was close to 200 Thousand Miles on my 2000 Chevy Silverado Z71 LS 1500 Series, 5.3 Liter, 8 Cylinder Truck. Even though they don't need it, I put in a Fresh Set of E3 Spark Plugs every July and I am just shy of 400 Thousand miles now on my Truck and it runs as smooth as when I drove it off the lot. Last Month I was experiencing a Mis Fire on Cylinder 8 (I had decided to skip replacing my plugs the past two years in a row). I thought, Ok, let's put in a new set. Swapped out the Plugs and purrs like a kitten.

Installed this over the cheap set of plugs that came with the wire kit I bought. I read what they are trying to sell. Once arrived, , One of the plugs literally had to have the hex filed to fit a socket. Once installed had codes start to show up for miss fire. Pulling plugs two of the plugs had poor spark performance if any. I put in the cheap plugs. Truck ran fine. Threw these in the garbage

I have noticeably more power and gas mileage. I live 17.8 miles from work and I usually burn a 1/4 tank of gas to and from work with a 2002 cadillac escalade awd. I burned 1/4 on 3 trips so essentially I got a free 18 miles.

work great in a 2012 serria 1500 wt 5.3 O

They show 1 package of 4 plugs in the ad and it looked like you order 2 packs of 4 but they are singles!Really!

This is a good product, however I was a bit taken back at the price. Found out I can get the same plug at Canadian Tire for 17 bucks.