Bosch Auto Parts

Bosch Auto Parts


Bosch OE Fine Wire Iridium Spark Plugs

The best of OE technology

Key Features

Engineered for high performance and long life

You don't have to choose between high performance and long life in your iridium spark plug. Bosch Iridium is engineered to deliver both. Bosch original equipment design, materials and processes represent the best of OE technology. The ultra fine wire design and laser welded tapered ground electrode deliver optimum performance, while the iridium center electrode and platinum ground electrode help it to go the distance.


Unlock the performance in your engine with Bosch Iridium Spark Plugs.

Iridium Tapered Electrode Iridium Laser Welded Electrode
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


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Iridium Spark Plugs


Bosch Iridium Spark Plugs

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Iridium Spark Plugs

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