Mine is a 1993 r33 i have done the interior on it you pull the doors off then peel the exsisting material off this is held on by some glue the only problem is if the car is the same as mine is the doors are moulded so u cannot pull out the parts where the material is on. Another point is that where the material goes there is like a router hole where the materila sits into to get just material in there it has to be a pretty good job i have a llok at my gallery where u can see my back doors we have put white piping around to give it a better look regards