My cabriolet had a set of GTi180 brakes on, nothing out of the ordinary. The piston size might be smaller? Iirc, was so long ago I can't really remember! But they did fit straight on.
Edit: found the info
206 GTi180 calipers require a thicker disc and have a 54mm piston, whereas 306GTi6 calipers have a 57mm piston
Edit: found the info

206 GTi180 calipers require a thicker disc and have a 54mm piston, whereas 306GTi6 calipers have a 57mm piston

Disclaimer: The above is not to be taken to heart and is probably a joke, grow up you big girl.
![[Image: Sig500x130.png]](http://i430.photobucket.com/albums/qq25/chris_rx71/Sig500x130.png)
![[Image: Sig500x130.png]](http://i430.photobucket.com/albums/qq25/chris_rx71/Sig500x130.png)