4x4 5" & 6" Rear Block/Ubolt Kits - 1980-2004 Ford F250/F350

4x4 5" & 6" Rear Block/Ubolt Kits - 1980-2004 Ford F250/F350Heavy Duty Rear Lift Blocks 5" & 6" Options Now Available in Powdercoated Black Finish Upgrade your rear suspension with our heavy duty lift blocks, precision machined to match factory dimensions and offer improved strength, driveline angle correction, and lift. Lift Height: 6" Block: Replaces factory F 350 4" block = 2" of lift on F 350 3" of lift on F 250 or trucks without a factory block 5" Block: Provides 1" less lift than the 6" Note: Lift amount

Heavy Duty Rear Lift Blocks – 5" & 6" Options

Now Available in Powdercoated Black Finish

Upgrade your rear suspension with our heavy-duty lift blocks, precision machined to match factory dimensions and offer improved strength, driveline angle correction, and lift.

📏 Lift Height:

• 6" Block:

  • Replaces factory F-350 4" block = 2" of lift on F-350

  • 3" of lift on F-250 or trucks without a factory block

• 5" Block:

  • Provides 1" less lift than the 6"

Note: Lift amount may vary slightly on FX4 and other special packages.

✅ Applications:

• 1980–2004 Ford F-250 / F-350

• 1980–1996 Ford Bronco / F-150

• Also works on older leaf-sprung Ford trucks (as early as '78)

🔧 Features:

• 4° taper for driveline angle correction

• Captured U-bolt design prevents bolt spreading

• Multiple spring pin positions for versatile setup

• Mimics OEM bump stop leg

• 5/8" center pin

• Fits:

  • 3" wide springs

  • 3.5" axle tubes

  • Also compatible with 3.125" axle tubes found on older models and some Super Dutys

These blocks are a perfect solution for mild lift adjustments or for correcting stance when swapping springs or axles. Strong, smartly engineered, and easy to install.