I need help with pistons

ZunStang

New Member
Jun 5, 2020
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New Mexico
I need to change the pistons of my V6 3.9L 04 and I have a question.
Are the pistons of a 3.8L compatible with the 3.9L or is there a difference?
 
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Nightfire

15 Year Member
Dec 1, 2002
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TX
3.9 has just microscopic changes to both bore and stroke. The difference is negligible. They are interchangeable