FCS Fusion Fin Boxes

Product image 1FCS Fusion Fin Boxes
Product image 2FCS Fusion Fin Boxes
Product image 3FCS Fusion Fin Boxes
Product image 4FCS Fusion Fin Boxes

Regular price $ 13.26

FCS Fusion Fin Plugs

FCS Fusion fin boxes are the strongest and easiest fin box to install for twin tab FCS fins. The figure 8 shape spreads provides a stable footprint for optimal strength at the base of the fin and the high density foam-to-foam installation bond ensures the best performance from your fins. 

Fusion was developed primarily for EPS/Epoxy surfboards; however the system can be just as easily applied to PU/Poly construction surfboards.

FCS Fusion was designed be installed into the foam before laminating but if you're doing a color pigment lamination it is recommend to route the pocket through the colored fiberglass and cap the boxes with a piece of clear 4 oz fiberglass cloth, then sealcoat the board. The reason to install this way is so you can see the fin boxes and precisely sand the tabs open to keep a clean look. 

Installation requires the FCS Fusion Install Kit

Choose Your Fin Cant:

  • 5 degree box cant (grey tabs)
  • 9 degree box cant (orange tabs)
  • 0 degree box cant (white tabs)


Download the FCS Fusion Install Manual Here


Ask a Question
  • How do I order a thruster 5 cant set up? Should I just put 3 in the quantity window and you guys will know?

    For a 5 fin set up or (2) 9 degree, (2) 5 degree and (1) center box

  • What degree fin boxes would I need to order for a thruster set up on a short board?

    The fin cant degree depends on how you want the surfboard to perform. 9 degree cant is more turning. 5 degree cant is more speed.

  • How many do I get in a pack

    FCS Fusion fin boxes are sold individually

  • hello, I want to use these on a twin retro fish. what degree boxes should I get? thanks.

    For a classic retro fish with symmetrically foiled keel fins use 0 degree boxes. For more turning with modern single foil keels go with 5 degree fin boxes.

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