Overview
The Baer Brakes 4402007MG-2 is a Monster Green SS4 rear brake kit for the 2007–2018 Jeep Wrangler JK, 2018–2025 Jeep Wrangler JL and 2020–2025 Jeep Gladiator with the factory rear end. Its 4-piston S4 caliper is finished in Monster Green and grips a 13-inch vented rotor that is one piece, slotted and zinc plated.
Dual seals on the caliper guard against dust, weather and pressure, and the pistons are hard anodized aluminum riding on stainless steel abutments. Noise suppression clips are part of the build, and the pad type is DR1-C. Rotors come pre-assembled with NAS high grade stainless hardware, with all mounting brackets and hardware supplied. The 13-inch SS4 Plus fits most wheels of 17 inches or larger, though wheel styles differ, so verify your wheel against template S193H.
Key features
- Monster Green caliper finish
- 4-piston floating S4 caliper
- 13.0-inch vented rotor, one-piece with slotted surface
- Zinc-plated rotor surface
- Hard anodized aluminum pistons on stainless steel abutments
- Noise suppression clips
- Dual dust, weather and pressure seals
- NAS high grade stainless hardware on pre-assembled rotors
Choosing the right setup
Choosing rear brake parts is mostly about matching the hardware to how the vehicle is driven. A street-focused Jeep may need little more than a well-matched pad and rotor, while a vehicle that sees steep grades, heavy loads or frequent trail use benefits from thinking about cooling and pad compound. Caliper finish affects appearance only and does not change how the system stops.
Before fitting, look at the brake line routing and the parking brake linkage. A kit that re-uses the factory parking brake depends on that mechanism working properly, so adjust or service it first if it drags or feels loose. Bleed the system after any hydraulic work and confirm the pedal is firm before driving.
- Match pad compound to your typical driving
- Inspect the parking brake cable and adjustment before installing
- Replace worn hardware rather than reusing corroded clips
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4402007MG-2 |
| UPC | 90127995570 |
| Caliper | S4, 4-piston, floating |
| Caliper color | Monster Green |
| Rotor | 13.0-inch, 1-piece, vented, slotted and zinc plated |
| Rotor thickness | 0.81 |
| Minimum wheel diameter | 17.0 inch |
| Pad FMSI number | DR1-C |
| Template | S193H |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 inch |
| Axle | Rear |
| Parking brake | Re-uses OE parking brake |
| Brake hoses | Not included |
| Grade | Performance |
| Sold as | Kit |
| Country of origin | USA |
Vehicle fitment
Fitment covers the 2007–2018 Jeep Wrangler (JK), 2018–2025 Jeep Wrangler (JL) and 2020–2025 Jeep Gladiator, each with the OE rear end.
Older Wrangler models such as the TJ and LJ, and Cherokee or Grand Cherokee models, are not part of this fitment. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The kit keeps the factory parking brake in service, so no separate parking brake hardware is supplied. Hoses are excluded, which means the existing rear hose set needs checking for length and condition. Use template S193H to confirm the rotor clears a 17.0-inch wheel. Because rear calipers carry hydraulic pressure, a qualified brake technician should handle the installation.
What’s included
The package covers the Monster Green S4 caliper, the 13.0-inch pre-assembled rotor, and the mounting brackets and hardware.
Not included: brake hoses. Check the package contents against your installation before starting.
