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11-29-2013, 02:43 PM
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#3 |
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Senior Member
Join Date: Apr 2003
Location: Aberdeen SD
Posts: 645
Likes: 30
Liked 112 Times in 31 Posts
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Re: 487 vs. 487x heads
The difference is that 487X heads have induction hardned seats and rotators from the factory. The 487's simply have a non-hardened seat and normal retainer.
Jerry |
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