After a lot of testing and years of racing and street driving, VAC continues to recommend the following proven spark plugs for the S54:
Priced individually (1), Please order as many as needed for your engine.
385HP or less:
Despite the claims of other "fancy" types of plugs, the OEM type plug show the best performance on the Dyno over the life of the plug and tend to also be the most reliable.
OEM NGK Spark Plugs, BMW Part(12 12 0 022 902) for the S54.
Can't argue with good hard data; so we sell and
recommend these that work the best.
Suitable for all naturally aspirated cars under 400HP. For highly modded engines, or forced induction cars; see the plugs we
recommend below.
390HP or more NA / 500HP+ Boosted: The VAC staff recommends these specific OEM-manufactured
spark plugs for replacements on S54s that are boosted, have been fitted nitrous, or increased
compression.
They are of a lower heat temperature than standard units, making them a better choice for
modified engines that see forced induction or internal upgrades.
In our testing and years of use, these plugs work excellent on each engine application they are intended for.
Despite the claims of other "fancy" aftermarket types of plugs, these have shown the best performance on the Dyno as well as a smoother idle and plenty of lifespan.
Under hard performance driving conditions, checking spark plug gap and/or replacing these plugs on a regular 25-35k mile intervals is recommended for best results.
VAC Tech Tip:
Image is for example only, plug will vary from that shown.