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NGK Laser Iridium 94124 is the OE plug. Just stick with the OE Plug.
I do run Motorcraft plugs because they seem to crack a little less than the Autolites.
For spark plugs I always used NGK because that's what Motorcraft actually uses if I remember correctly. Autolites are complete garbage and always fouled out the few times I used them.
You can honestly just run stock plugs on the 1.8 with OTS tuning for stage 1/IS20/38. I ran these same VW/NGK "RS7" plugs including track use for thousands of trouble free miles.
I forgot to mention that I installed brand new pre-gapped NGK spark plugs two years ago
I like NGK, but you can't go wrong using what the manual calls for.
Champion and NGK have good reputations.
Ngk’s are hard to beat.
Have them for 15,000 miles on these and frankly can't tell the difference from (spec. plug) with original that it replaced. Gas mileage is no better and no worse.
If these are for a TJ (97-05) return them and get NTK (NGK). The 4.0 will not like anything else.
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