- Easy 3 bolt installation per side.
- Constructed from laser cut 3/16" steel, with 3 layers of added internal gusseting.
- Turning clearance for 37x12.5 tires on factory +57mm offset wheels, with zero rub. **
- Turning clearance for 40x13.5 tires on 00mm offset wheels, with zero rub.**
- Uses OEM rubber rear pivot bushings just like factory radius arms.
- Multiple hole mounting positions for limiting-straps, if needed.
- Maintains factory OEM alignment and axle placement geometry, so they function great from 0-3.5" of lift.
** You will need Thuren high-clearance sway bar, and you must replace/modify/trim your fender and liner/rocker seam, to take full advantage of this larger tire size and new turning radius ability.




Firch Fab is a small fabricator in Northern California making a name for himself with hand built products. These Firch Fab 2014+ Dodge Ram 2500/3500 radius arm/long arms are a replacement for improved suspension articulation and better tire clearance. Purpose built for off road but still comfortable and practical on the street, these are a great upgrade to get the most out of your truck and work on trucks with 0-3" of lift.
Constructed from 3/16" wall material with multi directional internal bracing for the length of the arm, this setup also boasts a significant increase in strength over stock.
These arms are designed to retain the factory cam adjustment bolts for easy caster adjustment after install. The arm also feature a bent design for better tire clearance than most long arm kits on the market. These are built to order, with a 4-6 week lead time.

