2013-2018 Cummins 4 Link 4" BDS Lift Kit 1 Ton w/air suspension (BDS1644H)
Your airbag-equipped Cummins is a powerhouse that needs a suspension setup to match it. BDS has come out with kits specifically designed for these trucks. Designed to convert the factory radius arm over to a stronger 4-link design offering improved stability, handling, and articulation.
Tire & Wheel Combinations:
- 37x12.50 w/ 17x9/18x9/20x9 and 5.625"
- 35x12.50 w/ 17x9/18x9/20x9 and 4.5"
Notes:
- The carrier bearing drop (122405) is necessary for models equipped with the two-piece rear driveshaft.
- Some vehicles may require rear driveshaft spacer kit 122007 to maintain adequate rear driveshaft engagement.
- Will NOT fit cab and chassis models.
- The shocks used in these kits are different than a standard 3500, do not use a different shock length, or damage to the airbag will result.
- Can be used on SRW or DRW models.
Installation:
- Click Here For Installation Instructions
- Difficulty: 3 (where 1 = easiest and 5 = complicated)
Part Number: BDS1644H

4" Front Coil Springs
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4-Link Box Kit
This Box Kit includes the following products:
- Driver & Passenger Side 4-Link Brackets
- 2 Weld-In Bungs
- 2 Machined Spacer Sleeves
- Rivet Nut Installation Bolt Pack
- 2 1/2" Rivet nuts
- 2 1.00 x .120 x 3.25 Sleeves
- 2 1.250 x 0.312 x 0.875 Sleeves
- 2 Brake line Relocation Brackets
- 2 5/16"-18 x 3/4" Type 23 Self Threading Bolts
- 2 1/16” Shims
- 2 1/8” Shims
- Pitman Arm
- 4/6" Track Bar Bracket
- 2 Track Bar Cam Washers
- Fish Wire
- 1/2" Bolt Tab
- 1/4” Spacer
- Front Driveshaft Spacer
- 2 Bump Stops
- 2 BDS Badges
- 2 Rivet Bolt Packs
- Bolt Pack
- Bolt Pack - 4 Link Brackets
- Bolt Pack Driveshaft Spacer
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4-Link Box Kit
This Box Kit includes the following products:
- Upper & Lower 4-Link Conversion
- 2 Straight Grease Zerk
- 2 1.00 x .120 x 3.25 Sleeves
- 4 Bushings (Large - Lower Control Arm)
- 4 Bushings (Small - Upper Control Arm)
- 2 .875 x .156 x 2.62 Sleeves
- 2 90 Degree Grease Zerks
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Auto Level Air Suspension 3" Rear Lift Components
This Box Kit includes the following products:
- 2 3” Rear Blocks
- 2 3" Air Bag Spacers
- 4 5/8” x 4” x 14” Round U-bolts
- 8 5/8” Fine High Nuts
- 8 5/8” SAE Flat Washers
- 2 Press In Pins
- 3 Air Tank Spacers
- 2 Bolt Packs - Air Bag Spacer
- Bolt Pack - Air Tank Spacer
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NX2 Series Shocks (2x)
The BDS NX2 series gas shocks offer impressive performance on and off-road. Standard in most BDS lift kits, these nitrogen-charged, twin-tube shocks offer 10-stage velocity-sensitive valving for lightning-fast damper performance and control.
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Fox 2.0 Series Shocks (2x)
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