Dinan Iridium Spark Plug Heat Range 9 N20 N54 N55 S55 N63 S63 - D640-0002
Dinan Iridium Spark Plugs are designed for compatible BMW engines and are suited to tuned and stock applications where the specified heat range and dimensions are correct. The iridium electrode provides strong spark performance, high temperature resistance and efficient heat dissipation. Heat range 9, 12 mm thread, 26.5 mm reach and 14 mm hex. Part number: D640-0002. Not legal for sale or use in California pending CARB testing.

