Description
Product Overview
The iFJF KF04050BK Polyurethane Body Mount Bushing Kit is engineered for 1999-2018 Ford F-250 and F-350 Super Duty trucks. Factory rubber cab mounts deteriorate from heat cycling, road salt, and heavy payloads — resulting in cab shift, body squeaks, and compromised ride quality. This upgraded polyurethane kit provides a permanent fix with superior chemical resistance and load-bearing performance.
Key Features
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Premium Polyurethane Compound: Higher durometer than OE rubber — resists compression set even under constant heavy load from plows, service bodies, and fifth-wheel towing.
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Complete Cab Mount Set: Includes all position bushings, steel sleeves, and washers needed for a full body mount overhaul.
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Extended Service Life: Impervious to diesel fuel, engine oil, road salt, and extreme temperatures from -40°F to +250°F.
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Improved Handling: Reduces cab-to-frame movement for tighter steering response and less body roll in corners.
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Chamfered Edges: Precision-molded bushings drop into factory mounting pockets without trimming or shimming.
Compatibility Table
| Year |
Make |
Model |
Drivetrain |
| 1999-2018 |
Ford |
F-250 Super Duty |
2WD / 4WD |
| 1999-2018 |
Ford |
F-350 Super Duty |
2WD / 4WD |
Specifications
| Specification |
Value |
| Part Number |
KF04050BK |
| Material |
High-Durometer Polyurethane |
| Color |
Black |
| Position |
Complete Cab Mount Set |
Why Upgrade from Rubber to Polyurethane?
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3x Longer Service Life: OE rubber bushings typically need replacement every 60,000-100,000 miles; polyurethane lasts the life of the truck.
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Better Load Handling: Won't crush or deform under heavy camper, plow, or service body weight.
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Chemical Resistance: Diesel spills and oil leaks won't soften or swell polyurethane like they do rubber.
Installation Tips
Body mount replacement on Super Duty trucks requires lifting the cab from the frame. A two-post lift or frame jack with cribbing is essential. Remove all bolts on one side at a time, slightly lift the cab (2-3 inches), and swap bushings. Never lift the cab more than necessary — brake lines, steering shaft, and wiring harnesses have limited slack. Torque bolts to specification and re-check after 500 miles.
Frequently Asked Questions
Q: Will these fit my 2018 F-350 dually?
A: Yes. The KF04050BK kit fits all F-250 and F-350 Super Duty models from 1999 through 2018, including dually configurations. Both 2WD and 4WD are covered.
Q: Are polyurethane mounts harsher than rubber?
A: Polyurethane is slightly firmer than OE rubber, which most Super Duty owners prefer — it translates to better road feel and less cab sway, especially when towing heavy. The difference in NVH (noise, vibration, harshness) is minimal.
Q: Do I need to lubricate these during installation?
A: Apply the included polyurethane grease to all bushing contact surfaces during assembly. This prevents squeaking and allows proper bushing articulation.
Q: How long does installation take?
A: A professional shop typically completes the job in 3-5 hours. DIY with basic tools and a floor jack: plan for a full weekend day.
Q: What are symptoms of bad body mounts?
A: Key signs include cab creaking/popping over bumps, uneven cab-to-bed gap, doors that don't close smoothly, and excessive body lean in turns.
