What heat # spark plugs

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14 July 2012, 02:41 PM

Smoove mike

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What heat # spark plugs

Hi all,

What would be the best heat rating iridium spark plugs for a 2007 2.5 sti running 375 bhp and 445 lbft?

Cheers,
Mike.

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14 July 2012, 02:50 PM

banny sti

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Stick with NGK PFR7B plugs

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14 July 2012, 02:56 PM

Terminator X

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I switched to 8's and car ran like a dog, switched back and all was good.

TX.

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14 July 2012, 03:26 PM

Smoove mike

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PFR7B are platinum I thought iridium was better?

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