ZR-1, LT-5, 6-sp.
These seats are amazing. Underrated, but changed in later C4s.
All the bodywork from the front of the doors back is unique to the ZR-1. Here you can see how much wider the rear end is by the “step” between the fender and the non-ZR-1 door jam. The widening starts mid door.
The most subtle flared fenders ever!