2013-2018 Cummins 4" BDS lift Kit w/ Rear Air Ride (BDS1643H)
BDS Suspension is now shipping suspension lifts and accessories for the rear air ride equipped RAM 3500 4WD trucks. These standard kits are designed to retain the factory radius arms by relocating the frame mounting location using a pair of 1/4" steel drop brackets to maintain suspension geometry. The drop brackets key off the factory mounts and tie them into the frame for extra strength.
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 a 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: BDS1643H

4" Front Coil Springs
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4" Front Box Kit
This Box Kit includes the following products:
- Pitman Arm
- Trackbar bracket
- Fish Wire
- 1/2" Bolt Tab
- 1/4” Spacer
- 2 4-6" brake line relocation bracket
- 2 5/16"-18 x 1" Type 23 self threading bolt
- 2 weld-in bung
- 2 long machined spacer sleeve
- Driver & Passenger Side Radius Arm Drop Bracket
- 2 1/2" Rivet nuts
- 2 Spacer Sleeves
- 2 Cable Ties
- Loctite
- 2 Bump Stops
- Rivet nut installation bolt pack
- Bolt Pack - Trackbar Bracket
- Bolt Pack - Rad Arm Drop Brackets
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Auto Level Air Suspension 3" Rear Lift Components
This Box Kit includes the following products:
- 2 6” Rear Blocks
- 2 6" Air Bag Spacers
- 4 5/8” x 4” x 16” Round U-bolts
- 8 5/8” Fine High Nuts
- 8 5/8” SAE Flat Washers
- 2 Brake Line Brackets
- 3 Air Tank Spacers
- Bolt Pack - Rear Brake Line Bracket
- Bolt Pack - Air Bag Spacer
- Bolt Pack - Air Tank Spacer
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NX2 Series Shocks (2x)
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Fox 2.0 Series Shocks (2x)
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.
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