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Old 05-04-2015, 10:03 AM
cn90 cn90 is offline
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Quote:
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.
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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
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