2019-2022 Cummins 8" 4-Link Lift Kit (1728H)
This BDS system converts your truck to an 8" lifted 4-Link setup monster! The full replacement 4-Link system is centered around 4 massive control arms featuring greaseable ends and is set up to correct the alignment tire placement inside the wheel well, while reducing caster change through wheel travel creating a more controlled feel both on and off-road.
Wheel & Tire Combinations:
- 40x13.50 w/17x9 and 4.5-5.5" back spacing
- 40x13.50 w/20x9 and 4.5-5.5" back spacing
Notes
- Will NOT work with Mega Cab Models with 8-bolt Transmission (Aisin)
- NOT compatible with DRW models
- Will NOT work with cab and chassis
- Recoil Traction bars recommended
- Designed for use on diesel models only
- Will NOT fit trucks with rear airbags
- This kit requires the use of an aftermarket front driveshaft (not provided) in addition to the (provided) indexing ring kit - BDS122624 (6-bolt) or BDS122421 (8-bolt). Both must be installed, however due to variations between truck configurations BDS recommends installing the kit prior to taking measurements for the aftermarket front driveshaft to ensure correct length. Vehicle can be driven without front driveshaft. Kit was tested with a Drive Line Plus flange and driveshaft, however other high angle driveshaft options can be used.
Rear Box Kit w/ Overload
This Kit contains the following:
- 1 5" Block, Flat, 1/2” offset, Wing - DRV
- 1 5” Block, Flat, 1/2” offset, Wing - PASS
- 4 9/16”x 4-3/8” x 19-1/2” Round U-Bolt
- 4 9/16 “x 4-3/8” x 16-1/2" Round U-Bolt
- 1 Rear Brake Bracket
- 1 Bolt Pack:
- 8 9/16" Fine High Nut
- 8 9/16" SAE Flatwasher
- 1 Bolt Pack:
- 2 3/8”-16 x 1-1/4” Bolt, Yellow Zinc
- 4 3/8” Washer, Yellow Zinc
- 2 3/8”-16 Prevailing Torque Nut, Yellow Zinc
Show more
Rear Box Kit w/o Overload
This Kit contains the following:
- 1 5" Block, Flat, 1/2” offset, Wing - DRV
- 1 5” Block, Flat, 1/2” offset, Wing - PASS
- 4 9/16”x 4-3/8” x 19-1/2” Round U-Bolt
- 4 9/16 “x 4-3/8” x 16-1/2" Round U-Bolt
- 1 Rear Brake Bracket
- 1 Bolt Pack:
- 8 9/16" Fine High Nut
- 8 9/16" SAE Flatwasher
- 1 Bolt Pack:
- 2 3/8”-16 x 1-1/4” Bolt, Yellow Zinc
- 4 3/8” Washer, Yellow Zinc
- 2 3/8”-16 Prevailing Torque Nut, Yellow Zinc
Show more
4-Link Box Kit
This kit includes the following:
- 1 4-Link Bracket Driver Side
- 1 4-Link Bracket Passenger Side
- 1 8" Front Track Bar Bracket
- 1 Pitman Arm
- 2 Bump Stops
- 4 Weld in Bungs
- 4 Front Sleeves
- 4 1.00 x .120 x 3.25 DOM Sleeve
- 1 Bolt Pack
- 2 1/2-13 Rivet Nut
- 2 Constant Velocity (CV) Joint Boot Clamp
- 2 1/2-13 Rivet Nut (.063-.200 tnk)
- 1 Bolt Pack - Front Sway Bar Links
- 2 Bolt Pack - Badge Rivets
- 1 Bolt Pack - 4-Link Bracket
- 1 Bolt Pack - Track Bar Bracket
- 1 Bolt Pack - Rivet Nut Set
- 1 Bolt Pack - Bump Stop Hardware
- 2 Spherical Bushing
- 1 Sway Bar Link - 7"
- 2 Pyramid Bushing - black
- 2 BDS Badge (4.964”)
- 2 Sway Bar Link Clevis Brkt. (2004RB)
- 8 11.5" Nylon Cable Tie - Black
- 2 F brake line
Show more
4-Link Box Kit
This Kit includes the following:
- 2 Dodge 4-Link Conversion - Lower Control Arm
- 2 Dodge 4-Link Conversion - Upper Control Arm
- 4 Bushing (Large - Lower Control Arm)
- 2 1.00 x .120 x 3.25 Sleeve
- 2 Straight Grease Zerk
- 4 Bushing (Small - Upper Control Arm
- 2 .875 x .156 x 2.62 Sleeve
- 2 90Deg Grease Zerk
Show more
Add-A-Leaf Pair
This Kit Contains Front & Rear Pair of Leafs and 4 1/2”x6” Center Pin w/Nuts.
Show more
No Thanks
You must add this kit if you have selected the Dual Steering Stabilizers
No Thanks
No Thanks
No Thanks
Carries Bearing Drop Spacer
The kit comes with multiple shim plates for full adjustability from 1/8" to 1-1/2" of drop. Includes necessary hardware.
Show more
Only Fits 6-bolt Transmissions. (Will NOT work on the 8-Bolt Aisin)
No Thanks
Manual T-Case Shifter Extension
When installing taller lift kits on the later model RAM HDs it is necessary to index the transfer case to improve the front output operating angle for reinstallation of the factory front driveshaft.
While rare, gas trucks equipped with the manual lever-operated transfer case require an additional bracket to retain shifter functionality. BDS offers this shifter extension along with the necessary hardware for an easy install.
All parts are backed built of high strength steel and finished in a durable textured black powdercoat. For use on 6-bolt transmission-to-transfer case mounts with manual shifter.
Show more
