Bosch Auto Parts

Bosch Auto Parts


The most platinum for the longest life

Key Features
The most platinum with four yttrium-enhanced ground electrodes and the most powerful spark.
If you require the best in platinum performance over the longest service life, Platinum+4 is the spark plug for you. Platinum+4's unique revolutionary firing technology combines the advantages of surface air gap technology, four yttrium-enhanced ground electrodes, and a heat-fused center electrode with the most platinum, creating the most powerful spark you can buy.
Technical Details

PDFPlugDemands.pdf (558K)

Racing Demands of Spark Plugs

PDFSparkPlugFaces.pdf (665K)

Spark Plug Faces

PDFTighteningTorque.pdf (993K)

Diagram of Proper Torquing

PDFSparkPlugGapping.pdf (511K)

Spark Plug Gap Illustrations

PDFSP_NumberSyst_CHART_12.pdf (527K)

Spark Plugs Designation Codes

PDFPlugHeatRange.pdf (772K)

Spark Plug Temperature Curves/Heat Range


Download PDFs of our printable brochures here.


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Platinum+4 Spark Plugs


Platinum+4 Spark Plugs


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