OEM plugs are good but NGK iridiums are just as good and cheaper. If your car is stock, which if memory served correctly it is, then use NGK BKR8EIX.
I just bought my old APR S3+ '03 Jetta back. It's been running these for 12 years. I seem to be fine w/ my AEBs and my BKR7e plugs.
Im stage 2+ running a .028 if i run any larger of a gap I get these weird misfires under wide open throttle. Kinda feels like the clutch slipping but its not.
I've always used NGK in my hondas and never had any problems. They're OEM equipment on most (if not all) imports so I would recommend you just stick with what works.
As for the BKR7E's. It's proven that .028 gap is what you want with a stage 1 or 2 setup, and 0.032 for stock. No need to experiment. I've used these plugs on both factory coils and my current setup (OEM Bosch B7 2.0T coils) with no issues.
i put another set of bkr7e's but with 0.80mm gap, the car is running a lot better now.
I installed the BKR7E gapped to .028 with no issues. My vehicles seem to favor NGK more than Denso.
Another BKR7E user. Never had any problems with them.
I have replaced the four spark plugs with properly gapped VW (NGK) plugs and still the #2 misfires cold and randomly thereafter. The original ones looked quite normal actually - chocolaty brown. Very little wear and a .032" gap.
Just reporting in after some usage... the NGK 4644 aka BKR7E seems to foul easier than the Autolite plugs I ran previously.
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