Anyone run e3 spark plugs in there nnbs 5.3? My cousin neighbor runs them in his race car with a 6.0 and say they are a good spark plug to run. Ive heard to stick with the ac delco but the reviews in the e3 spark plug are pretty damn good. Anyone have experience with the e3? Good or bad wanting to replace my spark plugs soon!

 

See them causing missfires pretty regularly. I wouldnt run them.

 

NGK coppers or AC Delco Iridiums

 

majority of the E3 users believe everything they read and their butt dyno needs calibrating.

Run NGK or stock iridiums.. you will be fine.

 

ONLY RUN OEM PLUGS IN LS MOTORS. Your ignition system is designed to run on the OEM plugs. Aftermarket are not the same resistance and throw off the computer.

 

As others have said, run some NGK's or stock plugs. Don't believe the plug gimicks.

 

Thanks y'all. The more i read about the e3s the more i want to stay away form them.

 

NGK TR5 is a good cheap plug.

 

I consider e3's to be on the same par with bosch platinum +4, i dont like selling them..

 

I tried bosch platinum +4's on my 04 5.3, random missfires on all cylinders... Took em out... Ran delco iridiums in all my trucks afterwards.. I also tried the autolite iridiums... Ran fine with those