OEM piston identification

[proteusx301]

I've gone through every thread I can find relevant to 63D pistons, and cannot find a positive ID on what these are. Most threads I find show the stock 2g pistons to have 63D T F1 on the dome. The pistons I have are labeled 63D T EV. It is a 7-bolt engine with the flange thrust bearing design. I know from research that this engine definitely came from a Mitsubishi RVR. Just from googling the piston numbers, I can't find definite information on the compression ratio. One website claims that these are the same pistons that came in the Evo 3 7-bolt and were used in the RVR 7-bolt engines as well. Does anyone have any experience with these pistons from a donor motor or any information on specs?

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[justinschmiidt]

They look like oem replicas, something Rock Auto would sell. But that's just my educated guess. Take it with a grain of salt.

 

[proteusx301]

They are not OEM replicas. I remember seeing the Mitsubishi triple diamond stamped on the piston somewhere on the side.

 

[justinschmiidt]

They are not OEM replicas. I remember seeing the Mitsubishi triple diamond stamped on the piston somewhere on the side.

If that was indeed there it would be next to the wrist pin.

A lot of times though mitsubishi(and other manufactures) will sell their molds to companies that can make the parts for cheaper and resell them when they get this old. ( Our cars are considered classics by the dealer )