Overview
The Baer Brakes 4402001B is a Pro Plus rear brake kit for the Jeep Wrangler JK, Wrangler JL and Gladiator JT with the factory rear end. It pairs a six-piston 6P caliper with a two-piece, drilled and slotted rotor measuring 14.36 inch across, and it is sold as a complete kit.
The kit uses the D0731 pad type. The calipers are black and powder coated, with stainless steel pistons, abutments and noise suppression clips. The calipers are CNC machined from forged or billet aluminum, with USA as the country of origin. The rotors arrive pre-assembled with NAS high grade stainless hardware. Brackets and hardware are included, while brake hoses are not. The Pro Plus fits most wheels 18 inch or larger, but fit with every wheel style is not guaranteed, so compare your wheel against the Q145P template before ordering.
Key features
- Two-piece slotted and drilled rotor with a billet aluminum hat
- Six-piston black caliper with a floating design
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons intended to minimize uneven pad wear
- Dual seals that guard against dust, weather and pressure
- Powder coated finish and zinc plated rotor surface
- Rotors pre-assembled with NAS high grade stainless hardware
Before you buy
Rear disc brakes do most of their work when the vehicle is loaded, towed or driven down steep grades, so pad and rotor condition matters on trail and highway alike. A rear kit with a larger rotor and a multi-piston caliper spreads that load across more friction area, which helps the pedal feel consistent over repeated stops. Calipers and rotors are matched as a set, so replacing only one side of the axle or mixing parts from another system is not advisable.
Before installing, look over the parking brake components, the hub surface and the axle seals. Rotors with deep grooves, uneven wear or heat cracks should be replaced, and pads should be changed when the friction material is worn close to the backing plate or when the pedal feels spongy. Pads and rotors are often replaced together so the new surface beds in evenly.
- Check rotor run-out and the hub surface before mounting
- Inspect brake lines and fittings when hoses are supplied separately
- Re-torque lug nuts after the first few drives
- Bleed the system after any hose or caliper work
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4402001B |
| UPC | 844165051923 |
| Sold as | Kit |
| Axle | Rear, with OE rear end |
| Rotor type | 2-piece, vented, slotted, drilled and zinc plated |
| Rotor outside diameter | 14.36 inch |
| Rotor thickness | 1.1 |
| Caliper | 6P, six-piston, floating, black |
| Pad type (FMSI) | D0731 |
| Template | Q145P |
| Minimum wheel diameter | 18.0 inch |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 |
| Grade | Performance |
| Park brake | Not included; factory park brake is reused |
| Brake hoses | Not included |
| Country of origin | USA |
Vehicle fitment
It fits the 2007–2018 Jeep Wrangler (JK), the 2018–2025 Jeep Wrangler (JL) and the 2020–2025 Jeep Gladiator (JT) with the factory rear end (W/OE Rear End).
Vehicles outside those ranges are not covered. That includes Wrangler YJ, TJ and LJ models, and Gladiator model years before 2020. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Brake hoses are not supplied, so confirm the hose situation for your vehicle before the job starts. This kit does not include a park brake, because the factory parking brake is reused. The rotors are already assembled with their hardware, but the wheel template check should happen before mounting.
Rear brake work should be done by a qualified technician with the vehicle safely supported on stands.
What’s included
The kit includes the pre-assembled two-piece rotors, six-piston calipers, mounting brackets and stainless hardware.
Not included: brake hoses, and park brake components, since the factory park brake is reused.
