Autolite 764's or NGk TR55's :worship
best type of spark plug for 4.6L???
I was about to tune up my 98 and I was wondering what the best type of plug is for my 1998 GT?
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the only words you can read on the NGK box, in english are the words
"good ****"
"good ****"
G
NGK TR55 or stock #3951... You don't need the iridium unless you don't plan on changing em for another 100k
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