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The Stick
Join Date: Dec 2007
Location: Someplace Safe?
Posts: 17,328
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They are generic because length will scavange best on the lower end of rpm, flow, and timing while the od is large enough not to restrict the flow at higher rpms for the widest cam and timing options assuming it is a 5 liter motor.
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Richard aka "The Stick"
06 Cayenne S Titanium Edition
Last edited by RKDinOKC; 09-04-2016 at 05:21 PM..
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