Rear Mudguard Model 7 vs Model 88

Unlikely Giovanni .  The Wideline 88 was in two sections or the Slimline 88 had a dzus fastener for the seat rear fastener.   There will be issues with either and at the front where the swinging arm may touch.  Good luck, Howard

Wideline or Slimline ie year, that is the crux of this.question, the answers are in Dominator Service notes, but you can't answer a question if the question itself does not have the full information.