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  #21  
Old 02-13-2019, 09:23 PM
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Thanks I will give the IX a try. Currently have Bosch installed last year by po and even though they looked good (checked them 10k miles later when doing valve stem seals) at this point I will try everything before doing my intermediate levers.
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  #22  
Old 02-17-2019, 11:48 AM
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Quote:
Originally Posted by StephenVA View Post
NGK Plugs and gap settings for X5's



3.0

Iridium IX Part No. BKR6EIX, Stock No 6418, Plug gap .032”

Ruthenium HX Part No. FR6AHX-S, Stock 94279, Plug Gap .032”



4.4

Iridium IX Part No. BKR6EIX, Stock No 6418, Plug gap .032”

Ruthenium HX Part No. FR6AHX-S, Stock 94279, Plug Gap .032”



4.6is

Iridium IX Part No. BKR6EIX, Stock No 6418, Plug gap .032”

Ruthenium HX Part No. FR6AHX-S, Stock 94279, Plug Gap .032”



4.8is

Iridium IX Part No. IZFR6H11, Stock No 4294, Plug gap .044” (OE PLUG)

Ruthenium HX Part No. FR6AHX-S, Stock 94279, Plug Gap .044”



I added the newest plug the "Ruthenium" that has some added burn enhancements and longevity properties. In the engine world nothing stands still. Technology is always moving forward.


Iridium IX part# is 6441

Laser Iridium is 4294
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  #23  
Old 02-17-2019, 12:37 PM
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Corrected the posting
Thanks for catching that. I was using my iPad and could not read the NGK site correctly.old age moment.
The back ground on the two Iridium plugs is the fact that the 4.8is used the first generation Iridium plug as the IX version came after production. The difference is the metal in the center electrode
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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
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  #24  
Old 02-17-2019, 12:48 PM
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Ok cool, replacing mine ask we speak
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  #25  
Old 02-17-2019, 09:01 PM
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If you want to see how much plugs make a difference in idle and tip in acceleration, install the Bosch 3/4 prong plugs, drive 100 mile to burn off all the factory coatings, then install the NGK IRIDIUM IX plugs. I tried just that a few years ago right after I purchased the X5. Did not looking on NGK website ordered the wrong plugs from a vendor due to their miss information. Completely different experience.
__________________

2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green

Last edited by StephenVA; 02-18-2019 at 05:56 PM.
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