2.5 STi spark plugs

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10 January 2005, 03:00 PM

SWPGR

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2.5 STi spark plugs

Which spark plugs can be used on a US STi 2.5lt, running 420-450BHP?
The OEM are number 6 cold, and are about 10mm longer than the plugs for the 2.0lt engines.

Christos

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10 January 2005, 05:42 PM

Dyney

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What part number are the std plugs?

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10 January 2005, 05:47 PM

Bats-Wrx

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I may not make sense here but would the OEM plugs not be longer due to the cylinder head diffrences between the EJ257 heads an JDM/UK EJ20 heads.

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10 January 2005, 05:53 PM

Dyney

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I expect so.
Hence the request for the std plugs PN

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10 January 2005, 06:19 PM

Bats-Wrx

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When your car due on the rollers Dyney? I would be interested in seeing the graph. I have a V3 Type-r that recently done its bearings in. I think the EJ257 is a good get up and go short block until its time for the crawford 2.2.

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