We always use the NGK 6510 plugs in all our supercharged applications. Gap them down to .030" -.032"

 

I would highly recommend you DO NOT use E3 plugs.... There is NO gain to be found and the ground strap will actually inhibit flame propagation. This has been seen be me personal on a few different applications..(your truck will not idle correctly.)
Defiantly go with the NGK as JDM recommends..

 

I would highly recommend you DO NOT use E3 plugs.... There is NO gain to be found and the ground strap will actually inhibit flame propagation. This has been seen be me personal on a few different applications..(your truck will not idle correctly.)
Defiantly go with the NGK as JDM recommends..

Wiz, what about Denso Iridium
Spark Plugs? I run Denso Iridium Racing Spark Plugs for my Suzuki LT-R450 and those work great. Looks like they don't manufacture the racing ones for the raptor but they do Iridium ones. What are ur thoughts about that?

I would highly recommend you DO NOT use E3 plugs.... There is NO gain to be found and the ground strap will actually inhibit flame propagation. This has been seen be me personal on a few different applications..(your truck will not idle correctly.)
Defiantly go with the NGK as JDM recommends..

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Bump^ I would totally not even touch the spark plugs. have ford do that