Overview
The Baer Brakes SS4 Plus 4262689MG is a Monster Green rear disc brake kit for Ford 9 Inch Early Big Bearing rear ends with 5×4.50/5×4.75 bolt patterns. It pairs a four-piston S4 caliper with an 11 inch two-piece slotted, drilled, zinc-plated rotor, for owners upgrading the rear stopping power of a Ford 9 Inch axle.
The rotors come pre-assembled with NAS high grade stainless hardware, and the mounting brackets, stainless braided hoses and hardware needed for the install are included. Baer cannot guarantee fit with every wheel style, so the Template S125A is the recommended check against your wheel of choice.
Key features
- Two-piece, four-piston S4 caliper, manufactured in Phoenix, Az
- CNC machined from U.S.-sourced forged or billet aluminum
- Powder-coated finish in Monster Green
- Hard anodized aluminum pistons with stainless steel abutments and noise suppression clips
- Dual seals for dust, weather and pressure
- Two-piece slotted, drilled, zinc-plated rotor with billet aluminum hat
- Steel braided hoses, DOT approved
Matching the axle to the kit
Ford 9 Inch rear ends came with several housing and bearing layouts, so identifying the axle before ordering matters as much as matching the bolt pattern. Read the axle flange and bearing style from the rear end itself, then compare it with the flange this kit is built for. A bolt pattern measurement alone does not confirm the housing type.
Powder coat protects calipers from road grime, but chips still expose bare metal, so inspect the finish during service. Stainless hardware and steel braided hoses resist wear, yet the hose ends and fittings should be checked whenever the brakes are serviced. When rotor faces show heat cracks or uneven wear, replace the rotor rather than trying to resurface it past its usable thickness.
- Check the axle flange and bearing style on the rear end
- Inspect hose fittings for seepage at each brake service
- Replace rotors that show heat cracks or uneven wear
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4262689MG |
| UPC | 90127949283 |
| Caliper | S4, fixed, four pistons |
| Caliper color | Monster Green |
| Rotor type | Two-piece, vented, slotted, drilled and zinc plated |
| Rotor outside diameter | 11.0 inch |
| Rotor thickness | 1.020 inch |
| Axle flange | Ford 9 Inch Early Big Bearing |
| Bolt pattern | 5×4.50/5×4.75, 5 lug |
| Minimum wheel diameter | 15.0 inch |
| Pad FMSI number | DR1-C |
| Template | S125A |
| Hose material | Steel braided, DOT approved |
| Grade | Performance |
| Includes park brake | No |
| Emission code | 6 |
| Country of origin | USA |
Vehicle fitment
The kit is built for the Ford 9 Inch Early Big Bearing axle flange and 5×4.50/5×4.75 bolt patterns. Template S125A is the wheel clearance check.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Rotors come pre-assembled with stainless hardware, so the brackets and hoses are the main parts to fit during the install. Test-fit Template S125A against the chosen wheel before mounting. Brake work affects stopping ability, so have the system installed by a qualified technician.
What’s included
The kit includes the S4 calipers, two-piece rotors pre-assembled with NAS high grade stainless hardware, all mounting brackets, stainless braided hoses and hardware.
Not included: park brake components, since the kit lists Includes park brake as No.
