These are pictures of the old (#01) and new (#02) clutch release cylinder. The new part has a part number of NA01-41-920A.

2 observations: First, the replacement part had an extend pin (#04) coming out of the end of the piston but the old one (#03) did not; I'm not sure what the function of this pin is. There's a technical service bulletin that talks about a redesigned clutch release cylinder to address squeaking problems. But the picture shown of the redesigned push rod is not the same as the one I got.

Second, the size of the bleeder screw was different. The new part had a screw that was slightly narrower than the aftermarket Speedbleeder screw that fit on the original OEM slave cylinder (#05).