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Looks a lot like the 13:1 CP I put in but it said CP on mine. I would think most pistons would be marked by the manufacturer. How many different brands of piston are available right now???? Surely someone knows what it is but I have no idea.
 

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if thats a cp its not a 13.1... i have that piston and its taller. it might be a 12.1[/b]
Yeah the dome on mine was a little taller but not a whole lot. I dont know what it is.
 

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I was told it's a 12 to 1. I couldn't find any markings other then the numbers on top. Were on the piston does CP put their logo?[/b]

It will be on the webbing underneaths or directly on the bottom of the piston somewhere very easy to see. If its not really plain to see I'd say its probably not a CP.
 

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I was told it's a 12 to 1. I couldn't find any markings other then the numbers on top. Were on the piston does CP put their logo?[/b]

its in the bottom of thye piston. markings might be blocked by the pin.
 

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My money is on Wiseco 12.1 Baldwin or Shelf piston....


Here is my old Baldwin 14.1

 

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Baldwin pistons only come in stock bore, it looks like a shelf wiseco some where in the 12 to 1 range to me
 
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