Hello from france,
mugen MBX5 and MBX6 are like that.
The pilots make the chassis flat.
And here's the items we all use to convert an OffRoad buggy to a GT car...
http://www.imodel.fr/pieces-str8/322...200010109.html
http://www.imodel.fr/pieces-str8/322...200010109.html
http://www.imodel.fr/pieces-str8/322...200010000.html
Au revoir.