See more parts for your Dodge Ram 2500

Synergy MFG Dodge Add-A-Leaf Pack 03-13 Dodge Ram 2500/3500 4 Inch Axle Tube Dual Center Pin 4x4 Diesel


Synergy MFG

Model #8516-02-400

Synergy Add-A-Leaf Pack for 03-13 Dodge Ram 2500/3500 4x4 Trucks improves ride quality on both on and off-road driving.

  • 03-13 Dodge Ram 2500 4x4 Diesel
  • 03-12 Dodge Ram 3500 4x4 Diesel


  • For 11.5 Inch AAM Rear End w/4 Inch Axle Tube w/Dual Center Pin
  • Progressive 5 leaf design replaces the factory overload spring for improved ride quality both on and offroad
  • Eliminates the harsh spring rate ramp up caused by overload engagement
  • High quality 9/16 inch E-coated U-bolts, F436 extra thick hard washers and GR8 tall nuts included
  • Bolt on installation using basic hand tools


  • 8516 Add-a-leaf packs dual center pin
  • 1/2-20 UNFX6.0 inch long replacement center pins
  • 9/16-18 UNFX4.0 inchX11 inch long HD E-coated U-bolts
  • 9/16-18 UNF GR8 tall nuts
  • 9/16 inch ASTM F436 hard washer extra thick


  • The installation of this pack will affect the truck's load carrying characteristics when the factory overload is removed. The owner will notice more squat in the rear when carrying heavy loads. If large loads are frequently hauled, we suggest adding some form of airbag kit in conjunction with this kit for optimum ride and load carrying characteristics.
Proposition 65

/!\ warningWARNING: Cancer and Reproductive Harm

Vehicle Engine Notes
Dodge Ram 2500

Dodge Ram 3500

Ram 2500

Ram 3500

Synergy's Warranty Information
  • Warranty is non-transferable
  • All products must be on the original vehicle they were installed on by the original purchaser
  • Proof of purchase is required for all warranty issues
  • Synergy is not responsible for shipping or any additional labor charges incurred with the warranty of any product
  • Parts that are subject to wear and tear are not eligible for warranty. These products include but are not limited to: bushings, bump stops, bearings, tie rod ends, and dust boots
  • Products must be installed correctly, unaltered, and free from abuse
  • Synergy heavy duty front ball joint sets carry a 12 Month Unlimited-Warranty
  • Synergy hard parts have a Limited-Lifetime Warranty and are guaranteed to be free from defects in materials and workmanship
  • Product finishes are not guaranteed
To submit a warranty request, please email Please include your contact information, proof of purchase, and pictures or video demonstrating what you are attempting to warranty.

Check out these other great products