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-   -   piston weight markings? (http://forums.pelicanparts.com/911-engine-rebuilding-forum/145399-piston-weight-markings.html)

vichang4 01-23-2004 07:56 PM

piston weight markings?
 
Where exactly are the piston weight markings on the piston. My pistons have a ' O " and a " - " on the top. Stamped on the bottom side of the piston is a number and three pluses
" 97P12
W4 ++
+ "
According to the spec book the weight classes run from two minuses to two pluses.


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