Thread: 6X-4 heads on a 455
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Old 01-08-2021, 08:13 PM
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beertracker beertracker is offline
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Default 6X-4 heads on a 455
I am considering using 6X-4 heads with my 455. So for you guys who run this street combo what gas octane do you run? Will it live on 87 octane?

bt

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