Thread: Performer RPM Valves
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Old 02-01-2010, 05:58 PM
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Location: Sacramento, CA
Cobra Make, Engine: ERA 707, 446ci FE
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Default Performer RPM Valves
The Performer RPM FE heads use the 428CJ valve sizes, 2.09 and 1.66. Supposedly they can be machined for 427 valves, 2.19 and 1.73.

Anyone done this? Any flow data on the difference?
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