HKS Iridium S40i Spark Plugs for STI

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01 March 2003, 10:41 PM

Andy555

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Are the HKS Iridium S40i Spark Plugs ok for a standard Classic STI.
I am not sure what the heat rating is.

Any info would be gratly appreciated.

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02 March 2003, 12:12 AM

Bob Rawle

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They are "8"'s ... too cold, you need S35i's or NGK PFR7B's.

Bob

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02 March 2003, 09:27 AM

Andy555

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Thanks Bob much appreciated.

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03 March 2003, 08:28 AM

MelTypeR

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Bob i'm going to be taking my car in for a service on wednesday and will be fitting these to my car (STI5TypeR) will i have any prob because they are a colder plug?

Mel.

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