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4.5" Flare Fiberglass Bedsides for 07-13 GMC Sierra - FiberwerX

SoCal Part #: FIBGSB-001
Manufacturer Part #: GSB-001
MSRP: $630.00
Price: $580.00

*SPECIAL ORDER ITEM* Average Build Time - 3-4 Weeks

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Install 4.5" flare fiberglass bedsides on your 07-13 GMC Sierra for the ultimate off road machine. FiberwerX is pretty aggressive with styling but on these bedsides and they decided to keep it more clean and simple to factory. Fiberglass bedsides can be adapted to work with the stock tailgate and you have the option to add provisions for the factory fuel door to be re-installed. Fiberwerx fiberglass products are all hand-laid and 100% of their Molds are constantly refurbished or built from scratch to guarantee the best fitment and overall finish every time.
Read "How To" Install Instructions


  • Includes Driver and Passenger Bedsides
  • 4.5" Flare Per Side
  • Fits 35" Tires
  • Adapts to Stock Tailgate

Vehicle Fitment:

  • 2007 GMC Sierra w/ 6.5' Bed
  • 2008 GMC Sierra w/ 6.5' Bed
  • 2009 GMC Sierra w/ 6.5' Bed
  • 2010 GMC Sierra w/ 6.5' Bed
  • 2011 GMC Sierra w/ 6.5' Bed
  • 2012 GMC Sierra w/ 6.5' Bed
  • 2013 GMC Sierra w/ 6.5' Bed