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Old 12-02-2019, 10:39 PM
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KenMaisano KenMaisano is offline
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Its really about exhaust tuning and scavenging. and you can't get that with the manifolds. You might get around 5 to7 HP from porting the manifolds. I have done testing on the dyno.. If your using the manifolds it's best to keep the duration small and Lobe center wide. 110 to 114
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