KF04050BK POLYURETHANE BODY MOUNT BUSHING KIT REPLACEMENT FOR F250 F350 2WD/4WD 1999-2018 (BLACK)

iFJF part No.: FJ-FORD20-04050. 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 Premium Polyurethane Compound: Higher durometer than OE rubber resists compression set even under constant heavy load from plows, service bodies, and fifth-wheel towing. Complete Cab Mount Set: Includes all position bushings, steel sleeves, and washers needed for a full body mount overhaul. Extended Service Life: Impervious to diesel fuel, engine oil, road salt, and extreme temperatures from -40 F to +250 F. Improved Handling: Reduces cab-to-frame movement for tighter steering response and less body roll in corners. 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? 3x Longer Service Life: OE rubber bushings typically need replacement every 60,000-100,000 miles; polyurethane lasts the life of the truck. Better Load Handling: Won't crush or deform under heavy camper, plow, or service body weight. 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.