Thread: How much can you over-bore a 389
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Old 12-12-2002, 12:57 PM
fiedlerh's Avatar
fiedlerh fiedlerh is offline
Ultimate Warrior
  
Join Date: Feb 2002
Location: Illinois
Posts: 2,262
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4.0625 + 0.060 = 4.1225
Maybe you could use custom 4.125 pistons. At least it's a common ring size.

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