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Best spark plugs with mods?

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Old 04-15-2018, 02:35 PM
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2003 C32
Best spark plugs with mods?
Hello All,

I have a 2003 e55 with an 83mm pulley, ECU tune and shortly headers. I live in AZ. Which plugs are best? Someone recommended NGK LFR7AIX. Any input?

Thanks in advance, Mike
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Old 04-15-2018, 03:13 PM
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i am sure i will get flamed by this but my opinion the headers will help reduce back pressure and heat, the pulley increases them so its a wash from that perspective and standard plugs would be best choice - i see lots of posts stating to go one step colder blah blah - i don't see the need unless you are going extreme boost -- some others will jump in and straighten me out.
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Old 04-16-2018, 02:25 PM
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One step colders. http://vrpspeed.com/index.php?route=...product_id=224
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Old 04-16-2018, 04:30 PM
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Sent you a pm Mike
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Old 04-16-2018, 10:12 PM
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Thanks all! NGK it is
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Old 04-16-2018, 11:05 PM
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2005 E55
Amazon Amazon
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