2020-2021 Powerstroke 4.5" Coilover Radius Arm Suspension Lift System (BDS1551F)

Built to take full advantage of the factory suspension design, these 4.5" radius arm systems correct suspension, steering and driveline geometry with room for 37" tires. The arms bolt into the factory mounting points and reposition the front axle to correct the caster angle. Only the best quality materials & relevant parts go into BDS Kits; which means less maintenance, less time looking, and less confusion for you. Everything you need to take your new Super Duty to the next level.

Tire & Wheel Combinations:

  • 37x12.50 w/ 17x9 and 4.5"-5"
  • 37x12.50 w/ 18x9 and 4.5"-5"
  • 37x12.50 w/ 20x9 and 4.5"-5"

Notes:

  • Removal of the factory leaf spring block required. Net rear lift will vary depending on the height of the factory block but will result in a level stance.
  • If equipped with a 2-piece rear driveshaft, a Carrier Bearing Drop Kit may be required (BDS123402)
  • Front exhaust modification may be required to clear the front driveshaft (Gas Only)
  • Torque wrench capable of 405 ft-lbs required.
  • 37 x 12.50 tires may require minor trimming.
  • Due to taller factory ride height, Tremor models will not net full advertised lift height. The final ride height will be the same as standard models.
  • If installed on a truck with a top-mounted overload spring, with an overload spacer block taller than 1-1/8" UBT4027 (Qty: 4) are required)

Installation:

Part Number: BDS1551F

Base Kit


2005-2019 Powerstroke 4" Lift Front Fox 2.5 Remote Reservoir Coilovers (Pair) (FOX88402149)-Shocks-BDS-FOX88402149-Dirty Diesel Customs

Front Fox 2.5 Series Remote Reservoir Coilovers

When you want the best in performance and capability, go with FOX. These race-proven FOX 2.5 factory series remote reservoir coilovers up the ante allowing for next-level damper capability and control all neatly packaged. Designed for bolt-on installation, the engineers at BDS and FOX teamed up to offer this race-winning technology into a bolt-on, pre-tuned Coilover designed to perform and provide correct ride height right out of the box. From valving to spring rate, preload, and hose length these FOX coilovers are designed to take all the guesswork out of setting your vehicle up and are designed to be used with BDS lift systems. These coilovers use a large 2.5" body, 3" coil springs, 7/8" hardened carbon steel shaft, high flow piston, JM92 advanced racing shock oil, CNC machined 6061 T6 ends, and external remote reservoir improve damper capability across any terrain.

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2005-2020 Ford F250/F350 Front Coilover, 2.5 Series, R/R 4" Lift, DSC (FOX88406149)-Coilovers-BDS-FOX88406149-Dirty Diesel Customs

Front Fox 2.5 Series Remote Reservoir Coilovers w/ DSC Adjustment

These race-proven FOX 2.5 remote reservoir coilovers up the ante allowing for next-level damper capability and control all neatly packaged. Designed for bolt-on installation, the engineers at BDS and FOX teamed up to offer this race-winning technology into a bolt-on, pre-tuned Coilover designed to perform and provide correct ride height right out of the box. From valving to spring rate, preload, and hose length these FOX coilovers are designed to take all the guesswork out of setting your vehicle up and are designed to be used with BDS lift systems. These have the added benefit of DSC (dual speed compression) adjustment for easy-to-use high-speed and low-speed compression tuning build into the end of the reservoir to dial in the performance for various terrains. These coilovers use a large 2.5" body, 3" coil springs, 7/8" hardened carbon steel shaft, high flow piston, JM92 advanced racing shock oil, CNC machined 6061 T6 ends, and DSC external remote reservoir improve damper capability across any terrain.

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Coilover Mounting Kit


2017-2019 Powerstroke 2.5-8" Lift Coilover Mount Kit (BDS123613)-Shock Mount-BDS-BDS123613-Dirty Diesel Customs

Coilover Mounting Kit


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Front Box Kit

4" Front Box Kit

This Box Kit includes the following products:

  • Driver & Passenger Side Brakeline Bracket
  • Front Bump Stop Extension - 4" 
  • Driver & Passenger Side Sway Bar Drop
  • Track Bar Bracket
  • Bag Kit
  • Track Bar Cam Washer
  • 1/8" x 1-1/8" cotter pin
  • Zip Ties
  • Bolt Pack - Sway Bar Drop Bracket
  • Bolt Pack - Bump Stops

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Rear Lift


2020-2022 Powerstroke 4.5" Rear Block Kit (BDS013459)-Lift Blocks-BDS-BDS013459-Dirty Diesel Customs

4.5" Rear Block Kit

This Box Kit includes the following products:

  • 2 4.5" Rear Blocks
  • 4 5/8 x 3-1/8 x 16 Semi-Round U-Bolts
  • 5/8 washers
  • 5/8 high nuts

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2020-2021 Powerstroke 4" Lift Rear Leaf Spring (BDS003639)-Leaf Springs-BDS-BDS003639-Dirty Diesel Customs

4" Rear Leaf Springs (2x)


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Rear Leaf Spring Box Kit


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2017-2020 Super Duty 4" Rear Leaf Spring Box Kit (BDS013438)-Leaf Springs-BDS-BDS013438-Dirty Diesel Customs

4" Rear Leaf Spring Box Kit

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Radius Arm Box Kit

2005-2022 Super Duty Radius Arm Kit (BDS123251)-Radius Arm-BDS-BDS123251-Dirty Diesel Customs

Radius Arm Box Kit

This Box Kit includes the following products:

  • Driver & Passenger Side Radius Arm Assembly
  • Bag Kit - Radius Arms
  • Radius Arm Cam Plates
  • 18mm x 150mm Bolts
  • 18mm Prevailing Torque Nuts
  • 3/4" SAE Washers 

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Front Shocks

Important: With the Coilovers & the Mounting kit provided, you have the option of keeping the factory location shocks or upgrading to Fox 2.0.

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Rear Shocks

Improve ride quality and capability with the FOX 2.0 performance series IFP shocks. Specially designed for BDS lift systems, these FOX 2.0 aluminum body shocks offer improved cooling capacity and corrosion protection. These shocks use race-proven vehicle-specific valving along with an internal floating piston (IFP) monotube design to separate the shock oil from high-pressure nitrogen to eliminate aeration and maximize performance on/off-road.

Steering Stabilizers


Steering Stabilizer Bracket Kit

Required if you have selected Dual Steering Stabilizers.

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Recoil Traction Bar Box Kit

Features:

  • Adjustable axle wrap control utilizing dual-stage resistance springs
  • Full-floating traction bar design will not bind throughout the full range of wheel travel and/or hinder suspension articulation.
  • Does not adversely affect ride quality when springs - particularly when resistance springs are adjusted to still be active.
  • Spring preload can be adjusted on the vehicle without disassembling the traction bar
  • Adjustments can be made for optimum performance over a wide range of uses/terrain. (On-Road - Unloaded, Towing/Hauling, Off-Road, Competition pulling)
  • Traction bar ends are greaseable and rebuildable

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Universal RECOIL Traction Bar (BDS123409)-Traction Bars-BDS-BDS123409-Dirty Diesel Customs

Universal Recoil Traction Bar


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Recoil Traction Bar Mounting Kit

Required if you have added the Traction Bar.

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2017-2023 Powerstroke 0-6" Lift Recoil Traction Bar 3.5" / 4" axle Mounting Kit (BDS123416)-Traction Bar Mounting Kits-BDS-BDS123416-Dirty Diesel Customs

RECOIL Traction Bar Mounting Kit (3.5"- 4" Axle Diameter)

Mounting brackets are bolt-on, only requiring minor drilling for frame mount installation.

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Track Bar

Features:

  • Standard turn-buckle length adjustment as featured on other BDS truck track bars
  • Works with 0-4" of lift using the stock track bar bracket and 4+"-8" with replacement extended track bar bracket
  • 1-3/8" solid steel stock with CNC machined threads
  • Greaseable, high-durometer polyurethane bushings at the frame end
  • Heavy-duty, greaseable replacement ball joint pre-installed at the axle end

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Driveshaft Alignment Kit

These shims are designed to improve rear driveline angle on trucks equipped with a 2-piece rear driveshaft to eliminate any potential driveline vibrations.

Note:

This is not needed on trucks equipped with a 1-piece rear driveshaft.

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2020-2022 Powerstroke Driveshaft Alignment Kit (BDS123402)-Shims-BDS-BDS123402-Dirty Diesel Customs

Driveshaft Alignment Kit


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U-Bolts

The following kit ID's 1567H, 1567F, 1551H, 1551F - If installed on a truck with a top mount overload spring, and the overload spacer block is taller than 1-1/8" then these U-Bolts (Qty:4) are required.

All u-bolts come with high nuts and washers.

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Universal Radius 3-1/8"X19" U-Bolt (UBT4027)-U-Bolts-BDS-UBT4027-Dirty Diesel Customs

U-Bolts - (3-1/8"X19") (4x)


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Summary