Zex or E3 spark plugs

[SILVER BULLETT]

I watched an episode of Horsepower TV where they installed a set of E3 spark plugs in a LS1 mule motor and picked 7 hp on the dyno.Anybody out there running these or the Zex plugs?

[tremiles]

Unless the original plugs are completely trashed, you're not going to pick up a measurable increase from a back to back plug swap. E3 is a sponsor of PowerBlockTV (as well as Royal Purple), of course they will be pimping them on their happy dyno. NGK TR55's are a good reliable plug at a reasonable price, or you could go with the IX (iridium's) for less frequent plug changes considering how much of a PITA it is.

[INMY01TA]

Ditto on the NGKs, Autolites are good also.