They are exactly the same connecting rods as our stock ones in dimensions but much stronger.These are the ones that crower lists on their website as 1986-1987 Civic /CRX 1.3L 1342cc.
In the USA they were only used in 1986-1987.
The only downside is you don't find them a lot.These connecting rods come out of the EV1 /EV2 (als known as D13a2 ,Not D-series ) engine from a 3th gen civic DX 1.3L 1985-1987 .Rover also used the same engine in a Rover 213 .I've been searching a lot to find these engines but haven't found any yet.
From the honda parts cataloge i found these pictures which shows they are much stronger.

Are these engines more found in other countries in Europe ?In Belgium and the USA they are rare.