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Discussion Starter · #1 ·
looking at some used 331 pistons that have the oil ring through the piston pin and are are stamped "srp40f"on the bottoms.according to the srp catalog the #206066 331 piston doesnt use a oil ring support which i assume means no oil ring thru the pin.are the ones im looking at an older design or what?thanks for any ideas.
 

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I have a set of SRP pistons made for a 331ci that have oil ring through piston pin, I tried to find the part# in a catalog and also had no luck. It's strange but they do exist and have pics to prove it.
 

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Discussion Starter · #3 ·
thanks for the reply joe.did you run those pistons and i so,how did they perform.I can get these pistons ata pretty good price,but i dont want to buy something obsolete or just junk because theyre cheap.
 
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