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The FCS II Performer Quad fins Large/X Large fin set in the classy Performance Glass construction. Stable, smooth and loose enough to make you rip.The Performer Quad Keel is based on the theory of taking a full-size keel template and turning it into a quad set by extracting area from the back of the fin and re-shaping it into a mini quad rear. The side fins have been designed from scratch with the leading edge inspired by the popular Modern Keel, and a trailing edge similar to the Reactor template. The low-profile quad rear is compact yet matches aesthetically the side fins, almost like a little sibling. The smooth curves directly translate to how this set feels in the water. The robust, rounded tip and high surface area across all 4 fins ensure this set has exceptional acceleration from take-off and plenty of down-the-line speed and drive. When turning it delivers a trustworthy feel with an underlying level of response that allows you to break the line and turn in a tight arc when the wave presents steeper and more critical opportunities. Ideally suited to smaller, weaker waves, this set is adaptable to many higher-volume hybrid tri-quad models and quad-specific models such as the Machado Seaside Fish.The Performance Glass (PG) fins are machine cut from layers of solid fiberglass. These fins are stiff, and are widely used by pro level surfers because the integrity of the flex is maintained under immense force, and in the most extreme of conditions and situations. Don't be too scared by this description, some of the kooks here at boardshop have used them and they do actually work well!Give them a try! Several team riders have put these twins through their paces and loved them.PLEASE NOTE: These FCS II fins are NOT compatible with the original FCS and FCS Fusion fin plugs.
For delivery between Thu 23 Jul 2026 and Mon 27 Jul 2026
Royal Mail 3 - 5 Working Days
£3.99
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It's not a problem, all purchases on Boardshop.co.uk are covered by a 14 day exchange or refund guarantee. If you are not completely satisfied with your purchase it can be exchanged or the cost of the item(s) refunded. In case of all returns you will need to contact us for a returns number.
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Our teams are currently solving all issues in less than 4 hours, but at busy periods reponse time can be up to 24 hours. Any queries received over the weekend will be responded to (by a surfer) promptly on Monday.
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Outside UK 0044 (0)1243 674250
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Overview
FCS II Fins are designed for speed, in and out of the water. Thanks to their patented tool-less system, you can swap fins with a simple click, no fin key or screws required. This system saves time and effort without sacrificing hold or performance.
Made for FCS II fin boxes - the ones with two slots and no need for screws. They’ll still work with optional grub screws if your board has them, but they’re not essential. If your board has FCS I (older screw-in) boxes, these won’t fit.
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