Take your Can-Am Defender HD11 to the next level of strength and reliability with the Thumper Fab Rear Frame Stiffener Kit. Designed for riders who push their machines to the limit, this kit delivers unmatched reinforcement to critical areas of your Defender’s rear frame. Reinforces the lower suspension mounting tabs for superior durability under heavy loads and aggressive riding. Adds extra rigidity to prevent flex and frame fatigue when running lift kits, oversized tires, or hauling big loads. Precision-engineered from steel and finished with a corrosion-resistant powder coat for long-lasting protection.

Easy Bolt-On and DOES NOT require cutting or welding.  

Computer Aided Design
We have spent countless hours and multiple prototype revisions to make sure we have developed a kit that will greatly increase strength for your control arm mounts and chassis subframe. We designed the frame stiffener / gusset kit to reinforce weak links and to work with your OEM or Aftermarket Control Arms and Lift Kits with same model year fitment. Using the latest technology in 3D scanning and computer modeling software all aspects of the suspension and chassis geometry have been verified for precision fitment.