NGK - Iridium 94201 Spark Plug - B58/S55/S58 Engines

NGK Iridium SILZKGR8B8S spark plug, also known as the "94201" plug, for stock and tuned B58 engines. Required with Stage 2 and above packages on B58/S55/S58, Works great for those running high boost or for those running full E85 systems. Fine wire Iridium center electrode Platinum pad at the ground electrode for even wear in DIS ignition systems Engineered for specific vehicle applications Iridium tip is six (6) times harder than platinum Gap: Factory preset at 0.030". We recommend closing the gap to 0.018"-0,022" for those equipped with aftermarket turbos.  Replaces BMW Part Number 12120040551 Note: Beware of counterfeit NGK plugs being sold on Amazon & eBay for ridiculously cheap which can have quality control issues and/or degrade performance. We only sell Genuine NGK plugs. Priced individually, recommend replacement every 30K. Six required for B58/S55/S58. Vehicles Supported BMW G87 M2 BMW F87 M2, including Competition BMW G8X M3/M4, including Competition BMW F8X M3/M4, including Competition BMW F97/F98 X3M/X4M, including Competition Toyota A90 Supra