4 Inch Lift Kit | Ford F250/F350 Super Duty (1999-2004) 4WD | Square U-Bolt w/ Nitro Series Shocks | Zone Offroad

This configuration includes Square front U-bolts — typically suited for 1999–2000 model year trucks — paired with Nitro Series shocks featuring an internal floating piston (IFP) monotube design, a large 5/8-inch hard chrome plated heat-treated alloy steel shaft, race-developed high-flow piston design, application-specific valving, and a long-lasting clear anodized finish.

Overview

This 4-inch lift kit is designed for 4WD 1999–2004 Ford F-250 and F-350 Super Duty trucks. It delivers 4 inches of front lift via new leaf springs and 3 inches of rear lift via a block kit, providing clearance for 35-inch tires. The kit uses a complete leaf spring and block lift system and includes custom-valved Zone shocks.

Features

• New front leaf springs with bolt-style leaf alignment clamps, anti-friction pads, OE-style rubber bushings, and tapered leaves for long-term performance and ride quality
• 1-1/4-inch solid steel track bar with urethane mounts to properly center the front axle
• New front and rear U-bolts with high nuts and washers
• Rear 3-inch block kit
• Performance custom-valved Zone shocks included

Specifications

• Front Lift Method: Leaf Spring
• Front Lift Height: 4 inches
• Rear Lift Method: Block
• Rear Lift Height: 3 inches
• Shocks Included: Yes

Installation

• Estimated Time: 6 hours
• Difficulty: Moderately Easy
• Tools Required: Jack / Jack Stands, Standard Wrenches

Important Notes

• Dually applications will require different rear 3-7/8" I.D. u-bolts.
• Will not fit vehicles manufactured before 3-1-1999 with 5/8" track bar bolt head size.
• Vehicles equipped with 2-piece rear driveshafts may require the carrier bearing to be lowered.
• If vehicle is equipped with rear top-mounted overload springs, 4 u-bolts of part number UBT4035 may be required. Selecting the U-bolt option will add four (4) UBT4035s to the base kit.
• Trucks equipped with a gas engine may achieve a slightly higher front stance.
• If your truck has curved/radiused style front U-bolts, order kit #F1. If your truck has square style front U-bolts, order kit #F2.
• Vehicles manufactured prior to 2-28-99 require a different box kit due to a change in the factory track bar — please verify your build date before ordering.