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The intake port was cleaned up and blended into the valve pocket. Because the port walls are so thin, Jerry didn’t go in there with a rotary file, only a cartridge roll.
Reworking The 4.6 Two-Valve Cylinder Heads

 The intake port was cleaned up and blended into the valve pocket. Because the port walls are so thin, Jerry didn’t go in there with a rotary file, only a cartridge roll.  View Related Article

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