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

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.