@BundSama Well, the Group 5 was quit particular... It was a prototype under the silhouette of a "stock-car". For instance, the Porsche 935 had little to do with the 930, but it somewhat look like it; same thing with nascar in the early 90's... Not to forget that the group B was made from Gr.4 (GT40 and Stratos) and 5... And that the group B was made in 1982, when the FIA decide to "slowly" drop the group 4&5 but other organization keep the old set of rules for a while.