Article on E3 Spark Plugs

[Bluethunder2k3]

I have them in my truck. I noticed the truck idled and ran much better, especially in higher rpms, think my mileage went up .5 but thats it.

[TXsilverado]

horsepower also put a throttle body spacer onto a charger...they do know their shit, but they will push some BS onto you too because the sponsors are what pay their checks. extreme 4x4 is the only one i like