PMF Suspension OBS Spring Reverse Shackle Kit - 1992-1997 Ford F-Series

OBS Leaf Spring Reverse Shackle Kit (RSK) 

1992–1997 Ford F-250/F-350

Bring modern ride quality and improved handling to your 1992–1997 OBS Ford 4x4 with our Leaf Spring Reverse Shackle Kit (RSK). Developed with feedback from real OBS owners, this kit is engineered to retain factory OBS leaf springs while delivering a bolt-on installation that requires no frame or bumper modifications.

🔥 Key Features:

• OEM Spring Compatibility – Must be used with factory OBS leaf springs or exact-length replacements

• No Major Mods Required – Bolts directly to existing frame holes, clears all factory bumper mounts and components

• Improved Ride Quality – Relocates the shackle to the rear of the leaf spring, allowing impacts to transfer rearward for smoother handling

• Heavy-Duty Design – CAD-modeled, modular 3-piece system ensures strength, adjustability, and simple install on older frames

• Crossbar Support – Includes a heavy-duty crossbar that ties hangers together and reinforces the frame

📏 Available Lift Options:

• 2.25" Lift

• 3.5" Lift

• 4.5" Lift

🛠️ Installation Notes:

• Designed for 4x4 boxed frame rails

• For 2WD open frames, the Front Frame Rail Box Kit (sold separately) is required

• Will reuse OEM leaf hanger under the body mount on 4x4 chassis

• For 2WD conversions, the Shackle Pivot Bracket (sold separately) is required

• Some aftermarket springs (especially Pro Comp) are shorter than OEM spec and will cause geometry/axle placement issues — use OEM-length springs only

⏱️ Lead Time:

• Custom built to order – typically ships in 1–2 weeks

✅ Proven Performance:
By relocating the shackle to the rear of the spring, this RSK kit dramatically improves handling and ride comfort while maintaining factory geometry. For maximum ride quality, consider our Super Duty Leaf Spring RSK Kit, which uses longer 1999–2004 Super Duty leafs.