Denso Iridium plugs, worth the $$?
#2
i bought them because everybody was ranting and raving about them.........i installed them and guess what? i noticed nothing........even if it gave you 5hp, you would never notice that much hp increase.
#3
The six speed comes with iridium plugs already -- NGK, not Denso.
This is taken from a pdf of the service bulletin that the dealer uses to prep the 2003 CL-S.
Spark Plugs for M/T
The spark plugs in the Type-S with M/T are not platinum, but iridium (IZFR6K-11). Do not substitute platinum plugs; use only the specified spark plugs.
The spark plugs in the Type-S with M/T are not platinum, but iridium (IZFR6K-11). Do not substitute platinum plugs; use only the specified spark plugs.
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