ICON Vehicle Dynamics 214040 Icon Vehicle Dynamics 03-12 Ram Hd 4.5" Box Kit


4" Front Leaf Springs

This 4" system is designed to lift your Super Duty. 4" Front Leaf Springs provide room for 35€� tires. This system uses a custom progressive pack for ultimate ride quality, while providing 4" of lift. This system comes with a 1.75" bump stop spacer (not pictured) to prevent spring fatigue during the suspension cycle. Also included in this kit is 4€� rear block kit, with 15€� U-bolts for a leveled stance.


  • Increased wheel travel

  • Durable powder coat finish

  • Less body-roll than stock truck

  • Isolates Stock springs for Factory Like Ride Quality

  • No change in towing capacity

  • No drive shaft modifications needed

  • 100% Bolt-on system - no drilling, cutting or welding necessary for install


  • OEM Wheels & Tires Fitment: Yes

  • Recommended Aftermarket Wheels: ICON Alloys | 17x8.5 with 5€� Backspace / 6mm Offset

  • Recommended Aftermarket Wheels: ICON Alloys | 20x9 with 5€� Backspace / 0mm Offset

  • Recommended Aftermarket Tires: 35:" x 12.50" (Larger tires may fit but fender trimming and modifications will be required.)


  • Front U-Bolt Note: all front springs come complete with front u-bolts, washers, and nuts. When ordering any front spring system from icon vehicle dynamics please specify manufacture year.

  • No front driveshaft modification needed. Stock driveshaft is fully functional.

  • Springs are rated for diesel engines only

  • This system may require a carrier bearing drop bracket kit (33700)

  • These are stand-alone kits and are not to be used in conjunction with any other aftermarket kits


  • 31020 (Qty: 1) | 2000-2004 Front 4-8" Box Kit

  • 33100 (Qty: 1) | 1999-2004 1.375" Bump Stop Spacer Kit

  • 138507 (Qty: 2) | 2000-2004 Front 4" Leaf Spring Pack

  • 37001 (Qty: 1) | 2000-2004 Front Semi Round U-Bolt Kit

  • 194275 (Qty: 1) | 1999+ 4" Block Kit

  • 37003 (Qty: 1) | 1999-2010 Rear 15" U-Bolt Kit

Part Terminology:

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