FCS II Pyzel Performance Core Quad Rear FinsJon Pyzel's "JP" shaper quad rear fins. Pair with the Pyzel Tri Fin Set. Overview The Pyzel quad rear features the versatile Performer quad rear template. The pairings for the Pyzel Tri Quad sets are both intentionally undersized to work with many of Pyzel's models. (M Sides + S Quads, L Sides + M Quads). The Pyzel quad set will feel fast and stable with enough freedom to surf radically top to bottom. Jon Pyzel's "JP" shaper fin is designed as an All