Thumper Fab Can-am Defender HD11 Forward Control Arms

Upgrade your Defender HD11 with a control arm built for real-world abuse—designed, engineered, and manufactured in the USA by Thumper Fab. Our Forward Control Arms deliver the strength you need, without the unnecessary weight that kills ride quality.

Engineered Strength Without the Weight

Why run a boxed A-arm design? Because strength matters—but how you achieve it matters even more.
Thumper Fab’s boxed control arms feature a precision-engineered internal skeleton that reinforces high-stress zones while eliminating excess material where it isn’t needed. The result:

• Increased torsional strength for superior durability
• Reduced unsprung weight compared to traditional bulky designs
• Improved suspension performance and ride quality

This isn’t just heavier steel—it’s smarter engineering.

Kit Includes:

• Upper and Lower Forward A-Arms Front
• Extreme Duty 3 stage powder coating (when color is selected)
• Patented design allows for use of a uniball or ball joint