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Old 05-04-2015, 10:03 AM
cn90 cn90 is offline
Join Date: Jun 2014
Location: Omaha, NE
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Originally Posted by Riggodeaux View Post
I thought the NGK BKR6EQUP was the plug for the M54 engine? That's what I installed around 8k miles ago. Continues to run smoothly, and I am seeing about +1 mpg since doing this and changing the 02 sensors.
Correct, but during those 2004-2006 years, Iridium plugs didn't enter the market yet.

Now, Iridium is the standard plugs coming out of Honda, Toyota, etc. from factory as OEM equipment.
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
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