Which cabriolet frame do I have?
 

I purchased my 90 C4 cab used. One of the previous owners replaced the canvas and possibly the frame (it was a theft-recovery vehicle and I'm not sure if the roof frame was stolen).

The replacement tops I'm looking at come in three varieties:

83-94 two piece tops
83-94 one piece 993 conversion top
95+ one piece top.

My current top is one piece and I like it. I just wish is was watertight and didn't have a huge rip in it. How can I tell which of the one-piece tops my car needs? Are there noticeable differences in the looks of the frames or any dead giveaways?

Even after the 993 years the Bow on the tops are the same. The part number has been changed but I replaced mine and it was the exact same piece. You should be able to replace your top with a one piece 993 top with no probs.

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Greg-slant/cab
http://www.geocities.com/gregslantcab/

That's what I was hoping, but there are two separate 993 style tops sold through most places, and the price difference was several hundred dollars. World Upholstery tells me that the difference is the way they mount to the frame. As it currently leaks, I want to make sure that I put on the exact roof for the frame.