Thread: Cossie head who you use 137.8 .
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Old 05-04-2014, 09:16 PM
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nick Kirby
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Default Cossie head who you use 137.8 .
Got chance of buying a 2wd head just been polished and ported new bronze guides etc . Buts it's 137.8 bellow tolerance . But the specialist Says its fine can be use for 600 bhp
So usable or not ?
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