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My nearly free Pair valve sucker mod got more HP than they're claiming.
And yes, I proved it on the same dyno, same set of test runs.
You could probably get a 4.4hp increase by changing the slip on.
And BTW, the stock header is already really nice.
And yes, I proved it on the same dyno, same set of test runs.
You could probably get a 4.4hp increase by changing the slip on.
And BTW, the stock header is already really nice.
