FCS II Fins HI Quad Fin Set

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When you want the freedom to push extra hard, use the FCS II HI Quad Fin Set to harness all your efforts into vigorous maneuvers and wave carving mischief. Offering maximum control and noticeable drive, these signature Harley Ingleby fins are built to handle extreme power under the heavy footed surfers. If you want big fins that can make big moves, give the FCS II HI Quad Fin Set a go.

***Exclusively for the FCS II Fin System; will not fit in the traditional FCS Dual Plug System***

Tech Specs


  • Base: 4.90 in, 124mm
  • Depth: 5.22in, 132mm
  • Area: 18.32 sq in, 11822 sq mm
  • Sweep: 27.4°
  • Foil: Flat


  • Base: 4.28 in, 109mm
  • Depth: 4.41 in, 112mm
  • Area: 14.22 sq in, 9172 sq mm
  • Sweep: 31°
  • Foil: IFT


  • Size: X-Large
  • Fins in set: 4
  • Material: Performance Core


Versatile RTM construction delivers a consistent feel similar to a traditional fiberglass fin, but with the advantage of reduced weight. The stiff flex pattern extends progressively from the base through to the tip helping the surfer to maintain drive and hold through a turn. PC fins are reliable, very responsive, and can be used in a variety of different conditions.


A flat inside face combined with a convex outside face. The traditional flat sided foil offers an even combination of drive, pivot and hold and provides a very consistent, reliable feel over a wide variety of conditions.


Inside Foil Technology consists of a sophisticated hydrodynamic foil with a convex outside face, a rounded leading edge and a concave inside face. Inside foil increases the efficiency of water flow over the surface of the fin adding lift and reducing drag. The result is a fin with more options through increased hold and speed.


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If you are not 100% satisfied with your purchase you may return it for a full refund, or exchange within 30 days of receiving your order.