Choose Application
1 Choose Application
While these arms will work for 66-79 Broncos and F-Series, it's important to choose your application so we can provide the right options.
Choose Arm Color
2 Choose Arm Color
Choose Duff Signature Blue or Midnight Black.
C-Cap Spacers
4 C-Cap Spacers
If you are using T-Rex Radius arms on a High Pinion Dana 44 or Dana 60 then you must purchase these spacers that go in between the c-cap and head unit to accommodate for the larger axle tube of the HP44 or Dana 60 axle. Note: High Pinion Dana 44's were factory installed in 76-79 F150 4x4's and 78/79 Big Broncos and also had factory disc brakes. The Dana 60 C cap spacers do not work on '05 and up Ford Dana 60's
Color Matched C-Caps
5 Color Matched C-Caps
Add new bare or color-matched c-caps. The t-rex arms do not come with c-caps, so if yours are missing or you'd like to have a pair that match your new arms. Select which color you'd like below.
Heavy Duty Lower Coil Retainers
6 Heavy Duty Lower Coil Retainers
Choose Optional Lower Coil Retainers
5120 - These are our standard heavy-duty lower coil retainers for Early Broncos.
5121 Trail Package - These are our new dual sport lower coil retainers for Early Broncos. They allow you to mount the Hellwig sway bar and install a heim steering system TRO, tie rod over the knuckle. It also includes quick disconnects and park brackets to allow you to disconnect the sway bar off road.
5121 Street Package - These are our new dual sport lower coil retainers for Early Broncos. They allow you to mount the Hellwig sway bar and install a heim steering system TRO, tie rod over the knuckle. This system only includes a standard bolt, the sway bar cannont be disconnected.
5122 - These are our new HD coil retainers for all other Broncos and trucks.
