26/10/2026
🔥 B48 SPARK PLUGS
Stock plugs are fine up to around 350–360 hp, but above that we’ve seen ceramic cracking issues.
We then tried an NGK Racing 10 heat range plugs, but started getting misfires around 450 hp.
Our current choice is the latest S58 plugs. The only real difference between these is the better protection around the ceramic insulator.
We’ve had no issues up to 500+ hp with these plugs, its what we use and reccommend.
👉 Part number: 91469
NGK BMWPerformance