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Old 01-16-2014, 07:35 AM   #3
Professional Idiot
Joined: Dec 2010
Location: Deepest Southern France
Oddometer: 174
NGK CR8EK is a twin ground electrode plug; CR8E is a single overhead ground electrode. Or at least they should be according to the catalogues.

They're both a pretty basic plug and you can (at least in theory) get better performance from a fine wire Iridium plug. There are so many influencing factors though, it's very difficult to say if you'll see a benefit or not.

A recommended Ir plug is the CR8EIX. For me they work well.

Cheers... Paul
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