MaxTrac 813380 F-250/F-350 4WD 8" Rear Lift Blocks

Build a High-Lift Super Duty Rear Suspension

Take the rear suspension of your 2017–2026 Ford F-250 or F-350 Super Duty 4WD to a higher stance with the MaxTrac 813380 8" Rear Lift Blocks. These USA-made blocks are fabricated from steel and combine an 8" block height, built-in 6-degree angle, and integrated bump stop striker plates for heavy-duty lifted leaf-spring applications.
The 813380 is designed to replace the truck's existing factory rear blocks rather than stack on top of them. When replacing a factory 2" block, approximately 6" of net lift is achieved; replacing a factory 3" block results in approximately 5" of net lift over the original ride height.

Key Features

8" Rear Lift Block Height

Uses a substantial 8" block height for high-lift F-250 and F-350 rear suspension configurations.

Built-In 6-Degree Angle

Each block features a 6-degree angle to better accommodate suspension and driveline geometry with the increased rear height.

Integrated Bump Stop Striker Plate

A built-in bump stop striker plate provides an appropriate contact surface for the rear bump stop after the suspension height is increased.

Factory Block Replacement Design

Designed to replace the original rear lift blocks, with the final net height increase determined by the size of the factory blocks removed.

Fabricated Steel Construction

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

USA-Made

Manufactured in the USA and protected with a durable grey powder-coated finish.

What's Included

(2) MaxTrac 8" 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 8" in height.
Built with a 6-degree angle.
Features integrated bump stop striker plates.
Longer U-bolts are required and available separately.
Replacing factory 2" rear blocks provides approximately 6" of net lift over the original ride height.
Replacing factory 3" rear blocks provides approximately 5" of net lift over the original ride height.
Actual rear height increase depends on the factory block configuration being replaced.
MaxTrac does not recommend using 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: 813380
UPC: 706199414504
Tariff: 8708.80.6590
Kit Type: Lift / Level
Product Type: Rear Lift Blocks
Position: Rear
Block Height: 8"
Rear Lift: Application Dependent
Net Lift Replacing 2" Factory Block: Approximately 6"
Net Lift Replacing 3" Factory Block: Approximately 5"
Block Angle: 6 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: 17 lbs
Dimensions: 15" × 7" × 6"
Multiple Box Item: No
Origin Criterion: B
Unit of Measure: IN
Country of Origin: USA

Why Choose MaxTrac 813380?

The MaxTrac 813380 is engineered for Super Duty builds requiring considerably more rear suspension height than a basic leveling block can provide. Its combination of an 8" fabricated steel body, 6-degree angle, and integrated bump stop striker plate makes it purpose-built for high-lift leaf-spring configurations.
The replacement-style installation also avoids adding an 8" block on top of the factory block. This creates a more straightforward suspension configuration while delivering approximately 5"-6" of actual additional rear height, depending on the original factory block.

Perfect For

F-250 high-lift suspension builds
F-350 Super Duty 4WD upgrades
5"-6" net rear height increases
Factory lift block replacement
Leaf spring suspension systems
8" block applications