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Thread: Zex or E3 spark plugs
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05-03-2012, 07:16 AM #1
Zex or E3 spark plugs
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?
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05-05-2012, 08:46 AM #2
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red- 2000 Z28
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.
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05-05-2012, 02:52 PM #3
Ditto on the NGKs, Autolites are good also.
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