FCS II MB Split Keel Quad

These fins are specifically designed for fish and hybrid surfboard shapes. They excel on boards with wider tails that need extra drive and speed, helping you maintain momentum through flatter sections.

The split keel design blends the high-speed drive of a traditional keel fin with the maneuverability of a quad setup. It gives you the hold and acceleration of a twin-fin keel while allowing for tighter, more responsive turns.

No, these are FCS II fins designed for the tool-less FCS II system. While they can be used in older boxes if you use grub screws, they are optimized for the click-in, click-out convenience of the FCS II system.

Performance Glass is stiff and durable, offering a very consistent, predictable feel in the water. It provides minimal flex, which translates to maximum energy transfer and responsiveness when you are pushing hard through turns.

No, this is a dedicated quad set. The templates for the front and rear fins are specifically engineered to work together as a four-fin cluster to maximize speed and control.