I run NGK on my 15. The car runs great doesn’t miss. I used OEM Denso 5339 but they lasted 10-15k but then I tried NGK 92182 and they’ve lasted bout 40k so I’ve had no issues with them both of them Iridium.
Stage 2 EQT E85 and NGK 91006 here, but I only order from NGK directly.
NGK Laser Iridium 94124 is the OE plug. Just stick with the OE Plug.
I did buy 3 set ngk iridium from ebay for several vehicles and they are all fake . it misfire and destroy coil too...as soon as took the out the tip of the plugs worn out to the bone...
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.
Get those plugs out! I bought counterfeit NGK plugs from Amazon. By the time you get a misfire the ceramic may have cracked off around electrodes and damage your engine.
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.
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