Our offices and warehouse will be closed Monday January 2nd in observance of New Years. Please contact us at support@synergymfg.com and we'll get back to you as soon as we can. Thanks for the great year! - Synergy MFG

Synergy 2005+ Ford Super Duty F-250 / F-350 / F-450 / F-550 4x4 Leveling Springs

Part #: 866X-25
Weight: 60 lbs
  • MSRP: $400.00
Purchase through our Dealer Network.
Northridge4x4 4 Wheel Parts QUADRATEC
SDHQ ORW - Off Road Warehouse CJC Offroad Top Tier Suspensions

*Not all products are available from each dealer.
For a complete list, including international dealers, click here.

  • Weight
    60 lbs
  • SKU

The Synergy Ford Super Duty F-250 / F-350 / F-450 / F-550 front leveling springs lift the front of the truck 2.5”. The springs are progressively wound to provide a soft ride while increasing bottoming resistance. When used in the Synergy Leveling Kit, they provide 9 ¾“ of travel.


Part #Description
8663-25Synergy 2005+ Ford Super Duty F-250 / F-350 / F-450 / F-550 4x4 - Diesel
8664-25Synergy 2005+ Ford Super Duty F-250 / F-350 4x4 - Gas


  • Increased bottoming resistance
  • Increased travel
  • Fits in stock location
  • No modifications required to install


  • Hot formed, made from 5160H spring steel 
  • Suspension components feature an abrasion-resistant powder coat finish for maximum durability and corrosion resistance
  • Proudly made in USA
  • Pre-Set. This means no spring sag for the life of the spring
  • Dual rate
  • Sold in Pairs


  • Compatible with the 2.5 inch Leveling Kit
  • Only compatible with 4x4 front axle
  • Solid Height: 10 ¼“
  • Free Length: 22”

WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle.
For more information go to www.P65Warnings.ca.gov

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