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Old 09-21-2021, 04:25 AM
blykins blykins is offline
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This is not an Edelbrock issue.

The Edelbrock head out of the box is a very low performer, that's why we used to have them CNC ported. In addition, a 3/8" stem valve makes for a heavy valve that also obscures flow.

When specialty head shops provide CNC ported heads, they are ordered in bare castings so that the guides and valves can be custom fit for the application.

If you have 11/32" valves, *these are not Edelbrock guides*.
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