E3 Spark Plugs E3.53 Premium Automotive Spark Plug with DiamondFIRE Technology, 14mm Thread Diameter, 0.708” Reach, Taper Seat, Resistor, Pack of 1

These are great for power but terrible for gas mileage. Recommend if you want speed and power.

Noticed a difference on my 96 f150

These sparkplugs work great in my 2004 ford explorer V6., but there are some things you should know.1. Improve Gas Mileage- yes2. Reduce emissions - yes3. more power - yesAll above per Power Nation test, Video availableDown side, they only last about 60, 000 miles . The center electrode is not made of unobtanium like the 100,000 mile plugs. After a while it gets rounded and they start missfiring under load. So plan to replace at about 50,000 miles to get all of the benefits of these plugs. I changed mine at 70,000 and it was missing badly.

One cylinder fouled out a new plug in 5 to 10 miles. Then I found these. Now I get 5,000 miles and don't have to overhaul.

I have returned everything that I received regarding the spark plugs. If your going to charge me then charge me. That is what i received. But I've been burned three times now. I received eight (8) empty flattened cardboard sparkplug boxes and one or two loose sparkplugs in a sealed plastic bag.

I use them in everything,(even my mower) this are to replace ones in my 98 4.0 Explorer with 3 years and 60 thousand plus miles on a set, I contacted E3 and they sent me out another set under warranty even though I told them it's normal wear! If you replace your plugs with these make sure your wires and coils are good. I replaced the coil with an Accel and the wires with Taylor, Denso, or MSDs in a variety of autos. All showed more power along with better mileage.

They have only been in the truck for a little over 2 weeks, but seem to be doing great. She seems to to have better acceleration but that may just be from the tune up. Gas milage; really haven't seen an appreciable improvement, but will need to see if it's consistent or not.

My car had a rough idle...the hardest part is getting behind my engine to swap them out but thankfully I did, found this culprit and replaced all 6. She purrs now!