I did a lot of research on Crupi when I was building my Widowmaker a few years ago. I was researching their freewheels as the were later 80's exotica in my opinion. They were one of those items that few people knew about, were super expensive and hard to get.
Crupi would take a standard Suntour freewheel-all I have seen or own are black teeth- and replace the center with machined aluminum parts and build it into a master piece. When I called Crupi inquiring about information on them I was given the number of an old bike shop in California where they used to be built and I think Crupi Products was located. I will try to locate the name of the guy and the shop, but as soon as I asked about the freewheel you could tell he was walking down memory lane.
Here is a list of early products that I know of but there is a lot of information I don't know. Please add and or correct any of the information.
Pedal cages: Unchanged from the beginning. With cages being made for Hutch (lCrupi round), Hutch Mini, Suntour square MTB, Victor/Suntour semi oval, SR Speedtrap, Crupi Square
Crupi Freewheels: Modified Suntour freewheel-ss discussed above.
1" Stems: Early stems had a basic C.P. stamped into the top, In the 90's (94 ish?) the CP logo was more modern milled and the quill
Hubs: Low flange hubs are the biggest question. I don't have a lot of info on them. They were produced up to they changed to the second gen milled logo hubs in the later mid 90's. You could buy the foil decal hubs at many placed including Crupi's website up to a few years ago.
Bottom Brackets: Crupi made a square taper for the smaller guys but when it was released I don't know. The also made a titanium spindled 401 Flight Bottom Bracket that are extremely sought after still to this day. Brett Kimble had helped school me on these in the past. Like the freewheel this is an item that I have wanted since back in the day.
Pedals: Rounds were of course based off Hutch pedals. They are a modern cmc's version of the Triton design. First had foil decals and I want to say these came out in 92. Squares first appeared around 93 or 94. Cnc'd logo with red paint unless it was a colored body. Generational changes were discussed here.
Hubs: High flange hubs were said to be Crupi's Cnc'd take on the Campy Record hub with of course sealed bearings. I first saw these in 93 or 94 and almost bought a purple set. These were foil decade as well until Crupi switched to the milled logo of the later ten hubs.
There was also a company that popped up with really cool anodized parts called JP. Many have learned JP was the company doing all of the mill work for Crupi and there was friction between the two. JP then made slight changes to the milled parts and sold what is believed to be the left over Crupi stock as JP.