RX - 1st Gen (1999-2003) Discussion topics related to the 1999 -2003 RX300 models

NGK Spark Plugs

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Old 11-15-04, 09:59 AM
  #1  
tmuti13
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Default NGK Spark Plugs

does anyone know the difference between these two plugs:

NGK 4589
OE Style Laser Iridium; DOHC; @ Gap .044"

NGK 3764
Iridium IX Plug; DOHC; @ Gap Preset

thanks for your help.
Old 11-16-04, 02:16 PM
  #2  
Lexmex
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I have had experience with Torquemasters and Densos (current) in my 99 RX. I am going to swtich to the Iridium IXs. I would love to go with those, V-Powers, but they are copper and won't last according to my racing buddies.

From what I have read, the IXs will give you a better performance and a slightly longer service life and the OE Lasers.
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