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I need the part number for the best plugs for my 5.4. I'm using the motorcraft copper plugs for the lightning now gapped at the usual.

I have 11.1:1 compression and get a nasty bit of rattling at low RPM's and some pinging at WOT with 93 octane.

Suggestions?

Thanks
 

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Just bought some Denso Iridiums from Dennis....Mine are for pending blower conversion, but you could check with him as he's got the non -blown ones too, and see what he thinks... be prepared for sticker shock tho' LOL
........................................................................................................................................'95 LX 5.4 a labor of love...
 

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I'm useing copper cores now, and they seem to do a good job, but hey, I'll try anything once (well, maybe there are a few exceptions)
 

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NGK's "TR-6" = I run the TR-5's in mine - TR-6's are even colder

Just Passin Thru !!! :ztoohot:
 
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