MaxTrac 813340 F-250/F-350 4WD 4" Rear Lift Blocks

Set Your Super Duty Rear Height with 4" Angled Lift Blocks

Configure the rear suspension of your 2017–2026 Ford F-250 or F-350 Super Duty 4WD with the MaxTrac 813340 4" Rear Lift Blocks. Built from fabricated steel and manufactured in the USA, these application-specific blocks combine a 4" block height, built-in 4-degree angle, and integrated bump stop striker plates for lifted leaf-spring suspension setups.
Because these blocks replace the truck's existing factory rear blocks, the actual increase over the original ride height depends on the factory block size. Replacing a 2" factory block provides approximately 2" of net lift, while replacing a 3" factory block provides approximately 1" of net lift.

Key Features

4" Rear Lift Block Height

Uses a 4" tall block to increase axle-to-leaf-spring spacing on compatible Ford Super Duty 4WD applications.

Built-In 4-Degree Angle

Each block incorporates a 4-degree angle to accommodate the suspension and driveline configuration of the lifted truck.

Integrated Bump Stop Striker Plate

Features a built-in bump stop striker plate, providing the rear bump stop with an appropriate contact surface after installation.

Factory Block Replacement Design

The 813340 replaces the existing rear block rather than stacking on top of it, with actual net lift determined by the height of the factory block removed.

Fabricated Steel Construction

Heavy-duty steel construction provides a durable interface between the rear axle and leaf spring assembly.

USA-Made

Manufactured in the USA and protected with MaxTrac's grey powder-coated finish.

What's Included

(2) MaxTrac 4" rear lift blocks
Integrated bump stop striker plates
Longer U-bolts are not included

Vehicle Fitment

Fits

2017–2026 Ford F-250 Super Duty 4WD
2017–2026 Ford F-350 Super Duty 4WD

Important Notes

Blocks measure 4" in height.
Built with a 4-degree angle.
Features integrated bump stop striker plates.
Longer U-bolts are required and available separately.
Replacing a factory 2" rear block provides approximately 2" of net lift over the original ride height.
Replacing a factory 3" rear block provides approximately 1" of net lift over the original ride height.
Actual ride-height increase depends on the truck's original rear block configuration.
Do not stack rear lift blocks; replace the appropriate factory block with the correctly sized lift block.
MaxTrac does not recommend wheels wider than 9" or wheels with less than 4.5" backspacing. Using wheels outside these specifications may void applicable manufacturer warranties.

Product Specifications

Brand: MaxTrac Suspension
Part Number: 813340
UPC: 706199413125
Tariff: 8708.80.6590
Kit Type: Lift / Level
Product Type: Rear Lift Blocks
Position: Rear
Block Height: 4"
Rear Lift: Application Dependent
Net Lift Replacing 2" Factory Block: Approximately 2"
Net Lift Replacing 3" Factory Block: Approximately 1"
Block Angle: 4 Degrees
Bump Stop Striker Plate: Integrated
U-Bolts: Required; Sold Separately
Drivetrain: 4WD
Material: Steel
Color: Grey
Finish: Grey Powder Coat
Sold As: Pair
Quantity: 2
Weight: 15 lbs
Dimensions: 15" × 7" × 6"
Multiple Box Item: No
Origin Criterion: B
Unit of Measure: IN
Country of Origin: USA

Why Choose MaxTrac 813340?

The MaxTrac 813340 is more than a generic 4" suspension block. Its 4-degree angle and integrated bump stop striker plate are specifically useful for the rear suspension requirements of lifted F-250 and F-350 Super Duty trucks.
For trucks already equipped with factory lift blocks, the replacement design also allows a controlled increase in rear height without stacking blocks. Combined with USA-made fabricated steel construction, the 813340 provides a solid foundation for a properly configured Super Duty rear lift.

Perfect For

F-250 Super Duty rear lifts
F-350 4WD suspension builds
Factory block replacements
1"-2" net height increases
Leaf spring suspension setups
Angled rear lift configurations