Why Four Electrodes?
| Spark Plug, Bosch Platinum +4
Ref: 4477
Price:$6.75
Platinum+4's unique revolutionary firing technology combines the advantages of surface air gap technology, four ground electrodes, and a heat-fused center electrode with four times the amount of pure platinum, creating the most powerful spark you can buy.
Fits:
911 84-89 EXCEPT TURBO
924S All
944 83-89
944S 87-88
928 83-95
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