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Old 08-12-2008, 04:14 AM
blykins blykins is offline
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If a calculator is estimating 1-3/8" header pipes, then you need to find another calculator....

For a 351 sized engine, I would go with a 1-5/8"-1-3/4" size header....and I would probably lean more towards the smaller size.

However, if you ever have plans to stroke the engine, it may be worth your while to go big now.
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