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Old 05-04-2015, 09:07 AM
cn90 cn90 is offline
Join Date: Jun 2014
Location: Omaha, NE
Posts: 1,621
cn90 is on a distinguished road
Search bimmerfest E39 for the 4-prong business.
Most of us have now switched to single-prong NGK Iridium as mentioned in this thread.
The engine idles very smooth with the single-prong NGK Iridium.
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
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