Bilstein B8 6100/6112 Heavy-Load & 37-Inch Tire Conversion Kit
11-344841 is an optional hardware upgrade for compatible Ford Bronco vehicles already equipped with Bilstein B8 6100 or B8 6112 shocks. It provides spring-seat adapters to restore ride height under substantial constant accessory weight, plus jounce spacers for the prescribed heavy-load or 37-inch tire setup.
This is not a shock, spring or complete suspension kit. It does not convert factory shocks into B8 6100/6112 units and is not a universal spacer lift for an unloaded Bronco.
Application requirements
Bilstein lists this kit for selected 2021-and-newer Ford Bronco applications equipped with B8 6100/6112 shocks, with front and rear application rows. Confirm the exact year, trim and installed shock part numbers against the manufacturer's application guide. Do not infer compatibility with Bronco Sport, Bronco Raptor, factory dampers or another aftermarket shock series.
Included components
- Four jounce spacers: limit up-travel for the prescribed clearance and spring-travel requirements; they are not a stated vehicle lift height.
- Eight 10mm spring-seat adapters: use only where substantial constant weight has been added. One adapter increases shock-module length by 10mm, approximately 0.4 inch, corresponding to roughly 0.6 inch front or 0.4 inch rear ride-height change. These are setup effects, not a universal promised net lift.
- One mounting-parts kit: new upper-stem flange lock nuts, one per damper, plus front T-bar bolts and corresponding flange lock nuts, two of each per front damper.
Heavy-load use
Bilstein specifies this setup for approximately 150–200 lb of additional constant front weight and/or 400–500 lb of additional constant rear weight over stock, such as permanent bumper, winch or other accessory weight. These are added-weight guidelines, not an increase in vehicle payload rating.
Depending on added weight, use one or two adapters per corner, with an absolute maximum of two adapters per corner. Do not use the adapters solely to maximize lift on an otherwise unloaded vehicle. Whenever spring-seat adapters are installed, the supplied jounce spacers must also be installed, regardless of tire size, to preserve adequate spring travel and prevent coil bind.
37-inch tire clearance
The jounce spacers limit upward travel to provide clearance between the tire and metal fender. This kit does not prevent tire rubbing against chassis or body-mount components. A 37-inch tire claim is not a guarantee that every tire, wheel offset and suspension combination will clear. Evaluate full suspension travel and steering clearance for the actual setup.
Ride-height limits and assembly
For heavy-load installations using adapters, measure shock-module length at ride height exactly as shown in Figures 4 and 5 of the instructions:
- Front: no greater than 22 5/8 inches (575mm)
- Rear: no greater than 23 3/8 inches (593mm)
If a module exceeds its limit, use a lower circlip position or remove one spring-seat adapter. These are shock-module lengths, not vehicle lift measurements.
Use OE springs for B8 6100 modules and Bilstein-supplied springs for B8 6112 modules. Retain serviceable OE jounce bumpers and top-hat assemblies as directed. The conversion instructions supplement, rather than replace, the original shock-module instructions. Professional suspension installation and an appropriate spring compressor are required.
Check wheel alignment, brake/ABS operation, headlight aim and applicable driver-assistance calibrations after installation. Inspect any other modifications for static and dynamic interference.
Bilstein exact-part applications | Contents, heavy-load requirements and installation limits