VAC Recommends that you replace your spark plugs in these Classic 'M' engines every 15-20k miles, depending on use.
Direct replacement plugs for the S14 and S38 found in E30 M3, E28 M5, E24 M6.
Also used in some BMW motorcycle models.
Tech Notes:
- We recommend these plugs for many s14 engines up to about 250BHP depending on your fuel used and ignition timing. - For max performance street and mild race engines, up to about 310BHP, we recommend a race plug like the Bosch XR4CS
- We recommend these plugs for many s14 engines up to about 250BHP depending on your fuel used and ignition timing.
- For max performance street and mild race engines, up to about 310BHP, we recommend a race plug like the Bosch XR4CS
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