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Old 02-19-2017, 09:30 PM   #111 (permalink)
craysus
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Join Date: Jan 2017
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With exhaust and inlet mods... Are significant gains being found with porting and Port matching along with extrude honing... Or are after market manifolds readily available that could be used?
Does anyone have measured gains with just those mods?
Surely the oem didn't get the manifolds so bad out of the factory that big gains are available?

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