2005–2022 Ford Super Duty F-250/F-350/F-450 4-Link Conversion Kit, 2.5–10 in. Lift
Set Axle Position and Caster for Your Lifted Super Duty
The APOC Industries 4-Link Conversion Kit replaces the factory radius-arm layout with independently adjustable upper and lower control arms. Set axle position and caster to suit your build rather than relying on the factory layout to accommodate your lift.
Designed for 2005–2022 Ford F-250, F-350, and F-450 Super Duty with 2.5–10 inches of lift. The main control-arm bodies are constructed from 1/4" steel plate. DOM tubing is used only at the bushing ends, not as the main arm construction. Polyurethane bushings and grease fittings provide a serviceable suspension setup.
Adjustment Beyond the Factory Setup
The upper and lower arms adjust independently, allowing axle position and caster to be set separately. A supplied lower-arm alignment cam bolt provides easy fine-tuning during alignment, adding an adjustment feature Ford did not provide in the factory setup.
Construction & Features
- Independent arm adjustment: Set axle position and caster for your lift height.
- 1/4" steel plate arm bodies: Main structural construction of the upper and lower control arms.
- DOM-tubing bushing ends: DOM tubing is used at the bushing ends only.
- Polyurethane bushings with grease fittings: Serviceable components for ongoing maintenance.
- Included alignment cam bolt: Fine-tune lower-arm alignment during setup.
- No drilling or welding required.
- Built in the USA by APOC Industries.
What's Included
- (2) upper control arms.
- (2) lower control arms.
- 4-link conversion bracket.
- Polyurethane bushings with grease fittings.
- (2) 3/4" bolts supplied with the frame bracket.
- Lower-arm alignment cam bolt for fine-tuning adjustments.
- Installation instructions with arm-length settings by lift height.
The supplied frame-bracket bolts and lower-arm alignment cam bolt are included hardware, not factory hardware the installer must source.
Choose Your Finish
- Raw metal: Uncoated finish for your own finishing process.
- Satin Black: Choose the black-finished option from the Finish selector.
Installation & Alignment
- Estimated installation time: 3–4 hours.
- Tools: basic hand tools, floor jack, and jack stands.
- No drilling or welding required.
- Set arm lengths to match your lift height before installation, following the supplied instructions.
- Use the supplied lower-arm alignment cam bolt for fine-tuning during setup.
- Professional alignment required after installation.
Fitment
- 2005–2022 Ford F-250, F-350, and F-450 Super Duty.
- Compatible lift range: 2.5–10 inches.
Confirm your exact truck configuration and existing lift setup before ordering. The stated range describes compatible lift heights, not lift added by the conversion kit.
Further Reading
Built Right. Backed Right.
Our crew’s on call Monday–Friday, 9–5 EST. Hit us up at 865-983-5004 — real support, done right.
Component Specs
Compatible with 4" to 10" of lift
Yes
Yes, Size 1/4-28 Thread
Yes, no special tools required—just basic hand tools.
Ford Superduty 4 Link Conversion Kits
Superduty Suspension, Redefined
What all comes with a Superduty 4 Link Conversion kits?
Complete Kit – Ready to Install:
Engineered 4-Link Conversion for Your Super Duty
Apoc’s 4-Link Conversion Kit upgrades your Ford Super Duty’s suspension with enhanced control, smoother ride quality, and precise caster correction for lifted setups. The heavy-duty frame brackets bolt directly into the factory radius arm mounts—no cutting, welding, or drilling required. Each kit includes four extended-length control arms—two uppers and two lowers—fully assembled and ready to install. The kit also features upgraded axle-side cam eccentric bolts, giving you the ability to fine-tune caster easily—a feature never offered from the factory. Built for strength, simplicity, and serious performance.
Premium Bushings – Built for Life:
Apoc Industries backs our bushings with a Lifetime Warranty for lasting confidence. We use only the highest quality polyurethane (PTMEG-based) in all Apoc products.
PTMEG polyurethane offers superior articulation and a firmer, more responsive feel — without the harshness commonly found in solid joints like heims or flex joints.
These bushings are ideal for daily driving while providing excellent durability and performance for moderate off-road use.
Adjustable Length for Precise Handling:
Apoc control arm kits are designed with flexibility in mind. They are stock length when fully collapsed and up to 2.5 inches longer when fully extended, giving you plenty of adjustability to fine-tune your truck’s suspension geometry and handling. Whether you’re leveling, lifting, or optimizing alignment, our arms provide the range needed for a perfect setup.
100%
Red, White & Built Right
Lifetime Warranty Polyurethane Bushings
Built to Last, Easy to Rebuild
Apoc Industries' high-performance polyurethane bushings are backed by a lifetime warranty and engineered for durability you can count on. Easily rebuildable with basic tools, they deliver a firm, responsive ride without the hassle—made for daily drivers and built for the long haul.
Before
After
FAQ'S
Ford Superduty 4 Link Coversion FAQ's
A: A 4-link conversion replaces the factory radius arm setup, delivering better suspension geometry, improved ride quality, and more precise caster control—especially on lifted trucks. Unlike radius arms that limit articulation and can cause binding, a true 4-link setup allows each control arm to move independently, reducing stress on bushings and increasing flex. The result is smoother handling, better tire contact, and a more stable, confident ride—on the road or under load.hts.
At Apoc Industries, we understand that every suspension change impacts your vehicle’s geometry. That’s why we provide detailed installation instructions, including caster correction measurements tailored to a variety of lift and leveling heights. Whether you’re adding a small leveling kit or a full suspension lift, our guides ensure you have the correct specifications to dial in your alignment for maximum drivability, tire life, and performance.
Taking the guesswork out of your setup means better results — and a better ride..
A: Yes. Unlike the factory setup, the Apoc 4-Link Conversion Kit includes upgraded axle-side cam eccentric bolts, giving you full control over caster adjustment—a feature Ford never offered. Once your control arms are set to the correct length, these cams allow precise fine-tuning of caster, whether you're doing it yourself or having it aligned professionally. It’s a smarter, more flexible setup designed to improve drivability and alignment accuracy.
For PTMEG (polytetramethylene ether glycol) polyurethane bushings, the best grease is a silicone-based lubricant with PTFE (polytetrafluoroethylene) additives. Here’s why and what to consider:
Why Silicone-Based with PTFE?
: PTMEG polyurethane is resistant to petroleum-based products, but silicone-based grease is preferred as it won’t degrade the material and is explicitly recommended for polyurethane bushings.Tackiness
: PTFE additives lower the coefficient of friction and are waterproof, ensuring long-lasting lubrication and quiet operation.
: Silicone-based grease repels water, protecting bushings from corrosion and maintaining performance in wet conditions.
A: No cutting, welding, or drilling is required. The frame brackets are engineered to bolt directly into the factory radius arm mounts using existing holes, making installation clean, fast, and hassle-free. It’s a true bolt-on upgrade designed for maximum strength with zero guesswork.
Technical Resources
Caster Setup Guide
Everything you need to know about caster angle on lifted straight axle trucks — what it is, how to measure it, and how to set it correctly.
What is Caster? A Complete Guide for Lifted Straight Axle Trucks
A deep-dive technical guide explaining caster angle for lifted straight axle trucks — what it is, why it matters, how to measure it, and how to set it correctly with adjustable radius arms or 4-lin...