BDS506H | BDS Suspension 4 Inch Lift Kit With Radius Arm For Ford F-100 / F-150 4WD | Rear 4 Inch Leaf Springs | NX2 Nitro Series Shocks

• Easy, Bolt-on installation
• Pro-Ride dual rate coil springs ride smooth through any terrain
• Heavy duty steel drop brackets for proper suspension geometry
• Cast steel blocks provide level stance from front to rear
• NX2 Nitro shocks with vehicle-specific valving for better control

• 33 x 12.5 with 15 x 8 and 3.5 in. Backspace

Pro-Ride Coil Springs

A pair of full-length, vehicle-specific, Pro-Ride coil springs are supplied to provide the correct lift height and smooth, predictable ride across various terrains.

Extended Radius Arms

In place of the factory stamped steel radius arms BDS supplies a pair of high-strength tubular radius arms. The extended radius arm system will reduce caster change through wheel travel creating a more capable and controlled feeling in the steering wheel both on and off road.

Rear Lift Options

Block Kit

• Blocks are made from cast iron for strength.
• Tapered for correct pinion angle.
• Steel pin and hole are offset to restore axle position.

Block Kit + Add-A-Leaf

• Add-a-leaf helps freshen up old worn-out factory leaf springs.
• Blocks are made from cast iron for max strength.
• Includes new center pins.

Leaf Springs

• Eliminates any need for a lift block.
• Reduces axle wrap and creates a more controlled and stable feel.
• Multi-leaf progressive design for a smooth ride.
• Maintains factory payload weight ratings.

Important Notes

1. Front end alignment required. Alignment cams may be required. See page 118.
2. #123401 recommended if equipped with a front anti-sway bar. Ford produced 3 different styles of sway bar systems between 1980 and 1996. In extremely rare cases, modification may be required.
3. Extended lines required for all 4-6" lifts.
4. Does not fit F150 models without power steering.

Installation

Specification

• Front Lift Method : Coil Spring
• Front Lift Height : 4"
• Rear Lift Method : Leaf Spring
• Rear Lift Height : 4"
• Shocks Included : Yes