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The exhaust port received the most attention. Jerry opened it up until it equalled the outline left by the header gasket. He smoothed down the valve guide boss and then blended everything with a cartridge roll.
Reworking The 4.6 Two-Valve Cylinder Heads

 The exhaust port received the most attention. Jerry opened it up until it equalled the outline left by the header gasket. He smoothed down the valve guide boss and then blended everything with a cartridge roll.  View Related Article

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