E3 Spark Plugs E3.58 Premium Automotive Spark Plug with DiamondFIRE Technology, 14mm Thread, 0.750-Inch Reach, Gasket Seat, Resistor, Pack of 1

I know folks say just to use the standard plugs in the jeep 4.0 engine! However, I updated my ignition to the Viper style with wires and with the added voltage at the plug, these fit the bill perfectly. The coil and plug combo does make a noticeable difference in performance of this engine. Idles smoothly and just pulls better without that Pinto like bog between gears! 😂

great plug!!! first time i used this kind of plug and my fuel mileage went up 1 mile per gallon. i could not believe how smooth my car runs now. they are in a chrysler 300 (3.5). better spark = hotter burn=more power=less on the accelerator pedal= better fuel mileage. 0

This is my second set for the 98 Durango. I bought some standard plugs from the local auto parts store a few weeks back and installed. They were not hot enough for the 5.2 and the vehicle did not run right. Installed the E3 again and it runs like a champ. I highly recommend these plugs.

Reason for four stars that everything arrived and like I ordered but plugs were scattered around in the bag. Hoping threads didn’t get messed up. I will update once I put them in or check them over.

These plugs are both durable and good performers. I wouldn't say they are worth the premium over traditional plugs (worth it to everyone), but if you have an aftermarket distributor, like the Davis Unified Ignition or similar, they take any guess work out of gaps by working well out of their boxes.

Worked perfectly for my dodge challenger recommend resetting the pcm or ecm after installing other than that I’ve had no issues

HOW CAN I GET A REPLACEMENT FOR THE MISSING SPARK PLUG

I usually use a twin tipped platinum plug in my 2002 Chrysler 300M but at the price I got these for I had to try them. What a difference. The car now does 0 to 60 in 5.7 seconds. Before these plugs it was 6.7 seconds. These dropped it a whole second in a 0 to 60 test. I am sold on these. The HP and torque increased at least 5 to 10 percent. Very Very Happy with these. Anybody that has a 3.5L in a Chrysler should put these in. You will be glad you did.