BDS Suspension

6" Long Arm Lift Kit (NX2 Shocks) - 2003-2007 Dodge / Ram 2500 / 3500 4WD Diesel 647H

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MPN: 647H
$1,900.40
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6" Long Arm Lift Kit (NX2 Shocks) - 2003-2007 Dodge / Ram 2500 / 3500 4WD Diesel

Part # 647H

This 6" long arm lift kit come with 6" Pro-Ride Coil Springs and features solid upper long arms and tubular lower long control arms. The long control arm reduce caster change through wheel travel creating a more controlled feeling in the steering wheel both on and off road. This 4-Link long arm system retains the factory triangulation of the arms which adds to the stability of the suspension system. A dropped forged pitman arm is included to maintain the factory steering angles. A track bar relocation bracket is included to properly center the axle under the vehicle. Extended bump stops and sway bar links are included to maintain the OE characteristics. All four control arms are greasable for long term performance. greasable upper and lower control arms. The extended length lower control arms reduce caster change through wheel travel.

The rear of the Dodge Ram is lifted via a 4" block kit or optional Glide-Ride Leaf Springs.

Not only is the kit designed to last, but so is the finish. Every bracket and control arm is powder coated black for long term performance.

Check out the install article done by Four Wheeler Magazine.

  • Tire & Wheel Combinations
  • 37" x 12.50" w/17 x 9 and 5" back spacing
  • *Trimming may be required*

  • Est. Installation: 6-8 hours
  • Difficulty Level (easy 1 - 5 complicated): 3

Important Kit Notes

  • 1. The rear u-bolts will not fit dually applications.
  • 2. These vehicle were manufactured with two different diameter rear axles. You will need to measure the diameter of your rear axle before ordering. It should be 3-1/2" or 4" in diameter.
  • 3. Although unusual, if driveline vibration occurs, order the transfer case drop kit available in the optional accessories section. These transfer case drop kits only work with automatic transmissions.
  • 4. Some 4" rear axles with the dual overload option will require four u-bolts 4068 listed in the accessoires.
  • 5. Depending on the factory transmission mount, some 6" kits may require the transfer case indexing kit if a front driveline vibration persists. See installation instructions for details.
  • 6. If your Truck has had the steering gear box changed and the sector shaft diameter measures ~1-1/2"-1-5/8" you will need to add part # BDS082404 to your kit.

Base Kit Components 647H

Qty Part# Description
(1) 012405 Rear Block Kit 4" Axle
(1) 012603 03-07 Ram 6in Long Arm Box Kit
(1) 012801 Dodge Control Arm Mounts
(1) 012802 Dodge Control Arm Box Kit
(1) 032503 Dodge Coil Spring Kit
(2) 85750 NX² Shock Absorber
(2) 85761 NX² Shock Absorber


Vehicle Fitment Information

  • 2003 Dodge / Ram 2500 Truck 4WD
  • 2004 Dodge / Ram 2500 Truck 4WD
  • 2005 Dodge / Ram 2500 Truck 4WD
  • 2006 Dodge / Ram 2500 Truck 4WD
  • 2007 Dodge / Ram 2500 Truck 4WD
  • 2003 Dodge / Ram 3500 Truck 4WD
  • 2004 Dodge / Ram 3500 Truck 4WD
  • 2005 Dodge / Ram 3500 Truck 4WD
  • 2006 Dodge / Ram 3500 Truck 4WD
  • 2007 Dodge / Ram 3500 Truck 4WD

WARNING : This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov

BDS Suspension - "No Fine Print Warranty"

BDS stands behind its products and that's evident by their No Fine Print Warranty. This warranty protects the original retail purchaser against breakage, bending, sagging, or any other usage failure. We don't care if you jumped your truck off a cliff, lit it on fire, rolled it down a hill, installed Chevy parts on your Ford, or even if you didn't read the instructions and cross threaded a bolt with too many Ugga Duggas! This "no fine print" lifetime replacement warranty extends to cover all BDS hard parts and includes a lifetime warranty on bushings! Exclusions would be product finish and wearable items as described below. All warranties require the customer to provide a Proof of purchase including Name, product, purchase date and price paid.

No Fine Print Warranty ~ If you are the original purchaser of any BDS product and it breaks, they will give you a new part. Period.


Wearable Parts | Limited Lifetime Warranty

BDS NX2 Series Shocks and BDS/Fox Performance Series Shocks:
Shock oil seals are not covered by this Limited Lifetime Warranty because they are subject to wear over time and use. At BDS's discretion, leaking shock seals less than 2 years from date of purchase, free from contamination, damage, or abnormal seal wear due to misuse can be considered for repair or replacement under warranty. A shock absorber is a wear item and over time will experience diminished damping resistance due to normal component wear. This is not a defect in material or workmanship and is therefore not warrantable. Defects in material and workmanship do not include such things as dented cylinders or bent rods caused by obvious side impact, rust or corrosion.

Fox Proprietary Shocks and Coil Overs:
Fox Proprietary parts are covered by their warranty and are not included in the BDS Warranty. BDS may offer to assist with the warranty of defective product, at our discretion. Other warranty concerns should be handled through the Fox Service program. Leaking shock seals less than 1 year from date of purchase, free from contamination, damage, or abnormal seal wear due to misuse can be considered for Warranty. FOX service information can be
found here:  https://www.ridefox.com/service.php?m=truck

Ball Joints and Tie Rod Ends:
These items are subject to normal wear over time. However, Ball Joints and Tie Rod ends less than 3 years from the date of purchase, that have been properly greased, maintained, and do not show signs of abnormal use can be considered for warranty.

BDS Suspension's obligation under all warranties is limited to the repair or replacement, at BDS's option, of the defective material. BDS will cover the cost of ground shipping on warranty items, and a return shipping label if we require the warranty part to be returned to us. Any cost of removal, installation or reinstallation, expedited freight charges, incidental or consequential damages are expressly excluded from these warranties. Proof of purchase is required for all warranty claims.