Overview
The Baer Brakes Pro Plus rear brake kit in Silver, part number 4402001S, is a two-piece rear disc system with a 6-piston 6P caliper for Jeep Wrangler JK, Wrangler JL and Gladiator JT models that use the factory rear end. Its 14.36 inch rotor is slotted, drilled and zinc plated, with a billet aluminum hat.
The staggered piston layout is designed to reduce uneven pad wear, and the pads use the D0731 type. Rotors arrive pre-assembled with NAS high grade stainless hardware, and brackets and hardware are included. The kit is designed to fit most wheels 18 inch or larger, and the Q145P template should be compared with your wheel before mounting.
Key features
- Two-piece 6-piston 6P caliper manufactured in Phoenix, Az
- Staggered pistons described to minimize uneven pad wear
- Stainless steel pistons, abutments and noise suppression clips
- CNC machined from US-sourced forged or billet aluminum
- Powder coated silver finish
- Dual dust, weather and pressure seals
- Two-piece slotted, drilled and zinc-plated rotor with billet aluminum hat
- Pre-assembled rotors with NAS high grade stainless hardware
Things to check
A two-piece rotor with a separate hat is a common choice when owners want the rotor replaced without changing the hub. The hat and rotor faces should be checked for runout and cracking at each service, and the bolts that join them should be inspected for looseness. Staggered piston calipers spread clamping force across the pad, which helps pads wear more evenly over time, but pads still need routine checks.
Pad material affects both the feel of the brakes and how quickly the rotor wears. Choose a pad type that matches the caliper and the driving you do most, whether that is mostly on pavement or on trails. When the rear work is done, bed in the pads gradually and check that the caliper slides freely on its pins before the first drive.
- Rotor hat fasteners checked after the first drives
- Caliper slide pins free and lubricated
- Pad wear on both sides of the axle
- Brake hose condition before installing the kit
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4402001S |
| UPC | 844165051947 |
| Caliper | 6P, 6-piston, floating |
| Caliper color | Silver |
| Caliper finish | Powder coated |
| Rotor outside diameter | 14.36 inch |
| Rotor type | 2-piece, slotted, drilled and zinc plated, vented |
| Rotor thickness | 1.1 |
| Minimum wheel diameter | 18.0 inch |
| Lug count | 5 Lug |
| Wheel bolt pattern | 5×5.00 in |
| Pad type | D0731 (FMSI) |
| Template | Q145P |
| Grade | Performance |
| Axle | Rear |
| Park brake | No, re-uses OE |
| 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), each with the w/OE Rear End.
Vehicles outside those models, including the Wrangler TJ or LJ, the Jeep Liberty and the Cherokee XJ, are not covered by this kit. Confirm fit for your vehicle’s year, model and trim before ordering.
Installation notes
Rotors arrive pre-assembled with stainless hardware, so the work is mounting the supplied brackets, rotors and calipers at the rear. Brake hoses are not supplied, and the parking brake re-uses your OE parts. Check the Q145P template against the 18.0 inch minimum wheel diameter before mounting. A qualified technician should verify the finished installation.
What’s included
Sold as a kit: 6P calipers, two-piece rotors with billet aluminum hats, pre-assembled NAS high grade stainless hardware, and all mounting brackets and hardware.
Not included: Brake hoses.
