FCS V2 Performance Core Thruster FinsDesigned for fast, critical surfing. Suits hollow steep waves, and punchy beach breaks. Overview Designed for fast, critical surfing. The upright, pivotal side fin template produces quick start up acceleration and allows for tight turns in the pocket. Based on the FCS Kelly Slater K2. 1 template. Ideal Conditions Hollow steep waves, punchy beach breaks. Board Types All board types. Will fit the FCS II Fin System when used with grub screws and the FCS