Hi,

I've been using my 41 Chevy for a few years now but it's been using a bit more oil than is was at the start and the plugs are a bit oily unless really warmed up so thought I'd look at new rings.

I've taken the head off today and was hoping to see a size marking on the piston - but only a piston number appears to be there.

The pistons are 3.495" in diameter and I wondered if these were STD, or if not what size they are?

Thanks

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41 Chevy