MaxTrac 911413 Silverado Sierra HD 3/4" Square U-Bolts

Heavy-Duty U-Bolts for 1"-1.5" Rear Lift Blocks

Secure your rear lift block installation with the MaxTrac 911413 Square U-Bolt Set, designed for 2011–2026 Chevrolet Silverado and GMC Sierra 1500HD, 2500HD, and 3500HD applications using 1"-1.5" rear lift blocks. Each heavy-duty steel U-bolt measures 13" long × 3.26" wide × 3/4" diameter.
Made in the USA, these square U-bolts feature a gold zinc-plated finish for added corrosion resistance. They are also the specified longer U-bolts for use with MaxTrac 811410 1.25" rear lift blocks, making the two components a matched solution for a modest rear height increase.

Key Features

Fits 1"-1.5" Lift Blocks

Designed specifically to provide the additional U-bolt length required when installing 1"-1.5" rear lift blocks on compatible GM HD trucks.

Heavy-Duty 3/4" Diameter

Each U-bolt uses a substantial 0.750" / 3/4" steel diameter for heavy-duty rear leaf-spring suspension applications.

13" × 3.26" Square Design

U-bolt dimensions are 13.00" long × 3.26" wide × 0.750" diameter, providing the specified fit for the intended axle and lift block configuration.

Gold Zinc-Plated Steel

The steel construction is protected with a gold zinc-plated finish to help resist corrosion and exposure.

Matches MaxTrac 811410 Blocks

The 911413 is the specified U-bolt set for MaxTrac 811410 1.25" rear lift blocks, allowing the components to be paired for a complete block and U-bolt installation.

USA Made

Manufactured in the United States for the specified GM heavy-duty truck suspension application.

What's Included

MaxTrac 911413 square rear U-bolt set

Vehicle Fitment

Fits

2011–2026 Chevrolet Silverado 1500HD
2011–2026 Chevrolet Silverado 2500HD
2011–2026 Chevrolet Silverado 3500HD
2011–2026 GMC Sierra 1500HD
2011–2026 GMC Sierra 2500HD
2011–2026 GMC Sierra 3500HD
Applications using 1"-1.5" rear lift blocks

Important Notes

U-bolt dimensions: 13.00" × 3.26" × 0.750".
Designed for 1"-1.5" rear lift blocks.
Features a gold zinc-plated finish.
Compatible with MaxTrac 811410 1.25" rear lift blocks.
Verify your axle, block height, and required U-bolt dimensions before installation.
MaxTrac does not recommend wheels wider than 9" or wheels with less than 4.5" backspacing. Using wheels outside these recommendations will void applicable manufacturer warranties.

Product Specifications

Brand: MaxTrac Suspension
Part Number: 911413
UPC: 706199417598
Tariff: 8708.80.6590
Kit Type: Lift / Level
Product Type: Square Rear U-Bolt Set
Position: Rear
Lift Block Range: 1"-1.5"
U-Bolt Length: 13.00"
U-Bolt Width: 3.26"
U-Bolt Diameter: 0.750" / 3/4"
U-Bolt Style: Square
Associated Part Number: 811410
Material: Steel
Color: Gold
Finish: Gold Zinc Plated
Sold As: Set
Weight: 9 lbs
Package Dimensions: 16" × 5" × 1"
Multiple Box Item: No
Origin Criterion: B
Unit of Measure: IN
Country of Origin: USA

Why Choose MaxTrac 911413?

The MaxTrac 911413 provides application-specific dimensions for GM HD trucks running 1"-1.5" rear lift blocks, avoiding the guesswork of selecting generic U-bolts. Its 3/4" steel construction, square profile, and 13" length are designed around the intended heavy-duty leaf-spring suspension configuration.
These U-bolts are also the specified companion hardware for MaxTrac 811410 1.25" rear lift blocks, making them a natural choice when installing that rear lift block set.

Perfect For

Silverado HD rear lift installations
Sierra HD leaf-spring suspension
1500HD 2500HD 3500HD trucks
1"-1.5" rear lift blocks
MaxTrac 811410 installations
Replacement extended U-bolts