I am not a fan of anything other than stock spec plugs. I have seen too many running issues with these extra spark or foofydodad plugs. You may gain 1 or 2 HP at the most, you usually will get that just by changing the stock bad plugs with new stock plugs.
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Mark V
HAPPY HOLIDAYS!
1998 Explorer 4.0 SOHC
1998 Windstar GL 3.8
2001 Corvette Coupe 6 Speed
2006 Honda Shadow Spirit 750 http://public.fotki.com/snextime/
If your Exhaust tip is bigger than your cylinder bore, you are a Ricer!
Member of PETA... People Eating Tasty Animals
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