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