6" Radius Arm Lift Kit - 17-19 F-250/F-350 4WD - Diesel - w/ SL Shocks

6in Ford Lift Kit | Radius Arms Kit

Starting At*: $1,179 - $1,738
FREE Shipping on ALL ORDERS!*
*within the contiguous US; ground shipments only.
Price*: $1,473.45 $1,178.76
FREE Shipping on ALL ORDERS!*
*within the contiguous US; ground shipments only.
Superlift's typical processing time for orders is 24-48 hours. If there is an unforeseen delay you will be notified immediately.
Find a Dealer CALL 800-551-4955
CALL 800-551-4955
Find a Dealer CALL 800-551-4955
CALL 800-551-4955

Your Selected Product Fits These Vehicles

  • 2017-2019 Ford F-250 Super Duty DIESEL
  • 2017-2019 Ford F-350 Super Duty DIESEL
  • This is a complete coil spring replacement radius arm suspension Lift Kit for the 2017-2019 and newer Ford F-250/F-350 4WD – diesel engine
  • Provides 6” lift height
  • Includes track bar bracket and related brackets, rear blocks, front and rear Superlift shocks or Front and Rear Fox 2.0 Shocks.
  • This kit also comes in a King Shocks coilover shock option.
What does it include?
  • Front coil springs, replacement radius arms, pitman arm, sway bar brackets, track bar bracket, brake line brackets, steering stabilizer bracket, Superide shocks, and all hardware needed for installation.
  • Rear fabricated blocks with ubolts and Superlift shocks.
  • Detailed instruction manual walking you step-by-step through the lift kit installation procedures suitable for do-it-yourselfers (DIY) or professional installation

Superlift Suspension Systems now available with Fox® Shocks:

This 6” Lift for the 2017-2019 Ford Super Duty F-250 | F-350 4WD features Superlift’s massive, high clearance, precision engineered, tubular radius arms design to bolt right into the factory mounts giving your ride a truly custom look and an easy install .  These heavy-duty Radius Arms utilize a press-fit Cleveite® rubber busing for superior vibration dampening and durability.   

This 6” lift kit also contains new, diesel engine specific rated coil springs.  A new track bar relocation bracket that ensures proper steering geometry and track bar phasing. 

The rear lift is achieved with a new designed fabricated rear block that allows the removal of the stock block.  This fabricated block also allows for proper pinion and axle angle all while reducing axle wrap. Complete your 6-inch Ford F-250 | F-350 with the best variety of shocks on the market.  Shocks for this kit are available in the following: Superlift or Fox Performance Series 2.0 IFP Shocks.


  • Replacement Front coil springs improve ride quality while rear blocks maintain load capacity
  • Radius Arms with Cleveite® OE Style rubber bushings
  • Track bar relocation bracket prevents stud bind and steering wheel kick
  • Front and Rear – Superlift Shocks or Fox® Performance Series 2.0 IFP Shocks
  • Backed by our limited lifetime warranty


  • Retains OEM caster and camber alignment specifications
  • Maintains ride quality and handling characteristics
  • Designed using Original Equipment (OE) CAD data for accuracy.


  • If equipped with a 2-piece rear drive shaft, a carrier bearing spacer is required. Part # 9669
  • If equipped with factory top mount overload leaf springs, longer u-bolts are required. Part # 11734
Tire Wheel Backspacing Offset
37 x 12.5 17 x 9 4.5 -
37 x 12.5 18 x 9 4.5 -
37 x 12.5 20 x 9 4.5 -
37 x 13.5 20 x 10 - -12 to -24
38 x 13.5 17 x 9 4.5 -
38 x 13.5 18 x 9 4.5 -
38 x 13.5 20 x 9 4.5 -
38 x 13.5 20 x 10 - -12 to -24
40 x 13.5 20 x 9 4.5 -


IMPORTANT DISCLAIMER: The provided tire/wheel fitments are approximate. Actual dimensions of a given tire size can vary considerably from one brand to another. Manufacturers' wheel offset and backspacing measurement points are not always consistent. Backspacing greatly impacts tire-to-fender clearance when turning. Wheel width and backspacing influence whether the tires protrude past the fenders, and to what extent. Considering these important factors, we recommend that you fit-check your tire/wheel selection prior to purchasing.

  • Installation time: 7 hours
  • Difficulty level: 3 of 5

NOTE: If equipped with a 2 piece rear drive shaft, a carrier bearing spacer is required. Part # 9669

NOTE: If equipped with factory top mount overload leaf, longer ubolts will be required. Part # 11734



The kit works for the front on a dually. The primary issue with dually trucks is the rear u-bolts. We have to confirm axle tube diameter and length required and see if we have a u-bolt available, or, if they will have to be made at a shop near you.

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