Overview
The Baer Brakes 4302266B is a Pro Plus 14-inch rear brake system kit for GM small pattern 10/12 bolt rear axles with bearing-on-axle housing ends and a 5×4.75 and 5×5 bolt circle. It is built around a black six-piston caliper clamping a two-piece slotted, drilled and zinc-plated rotor, with a park brake shoe assembly housed in the backing plate.
The backing plate serves as the caliper mount and houses a modern one-piece park brake shoe assembly, so parking-brake hardware comes with the kit. The Pro Plus 14-inch is intended for wheels 18 inches or larger. Wheel styles vary, so compare clearance against the Q110P template before buying.
Key features
- Six-piston 6P caliper in a two-piece design, manufactured in Phoenix, Az
- CNC machined from US-sourced forged or billet aluminum
- Powder coated finish
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons designed to minimize uneven pad wear
- Dual seals guarding against dust, weather and pressure
- Two-piece slotted, drilled, zinc-plated rotor with a billet aluminum hat, pre-assembled with NAS high grade stainless hardware
- Stainless braided hoses and hardware included
Before you bolt it on
Before the rear kit goes on, look at the axle itself. Bearing-on-axle housings carry the wheel load directly on the axle shaft, so the bearing and seal condition matter as much as the brake parts. Lift the vehicle and check for play at the hub before mounting the new backing plate, and inspect the axle flange for cracks or burrs that would stop the plate from seating flat.
Brake work often exposes parts that were already worn. Brake lines, bleeder screws and the parking brake cable are common candidates for replacement once the rear brakes are opened. Plan for stainless hoses and fresh fluid at the same time, and bed the pads in gently after the first installation. Recheck lug torque after the first short drive, since new rotor faces can seat slightly against the hub.
- Check axle flange faces for burrs before fitting
- Replace worn parking brake cables during the install
- Use fresh brake fluid throughout the system
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302266B |
| UPC | 844165043140 |
| Sold as | Kit |
| Axle | Rear |
| Axle flange | GM small pattern 10/12 bolt, bearing on axle |
| Wheel bolt pattern | 5×4.75 / 5×5.00 |
| Lug count | 5 lug |
| Caliper | 6-piston 6P, fixed |
| Caliper color | Black |
| Rotor outside diameter | 14.0 inch |
| Rotor thickness | 1.15 |
| Rotor type | 2-piece, vented |
| Rotor style | Slotted, drilled, zinc plated |
| Rotor material | Iron with aluminum hat |
| Brake pad FMSI number | D0731 |
| Minimum wheel diameter | 18.0 inch |
| Brake hose DOT approved | Yes |
| Park brake | Included |
| Park brake cables | Not included |
| Front rotor included | No |
| Lug nuts included | No |
| Emission code | 6 |
| Template | Q110P |
| Grade type | Performance |
| Country of origin | US |
Vehicle fitment
Rear axles with a GM small pattern 10/12 bolt flange and bearing-on-axle housing ends are the intended fit. This flange style is found on Buick, Oldsmobile and Pontiac applications. Confirm fit for your vehicle’s year, model and trim before ordering.
Axles with C-clip housing ends use a different flange and are not what this kit is built for. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The rotors arrive pre-assembled with stainless hardware, and stainless braided hoses and hardware are included. Park brake cables are not included, and lug nuts are not included either, so both need to be sourced separately. Check wheel clearance against the Q110P template before mounting. Brake work is safety-critical, so have a qualified technician install the kit and bleed the hydraulic system.
What’s included
The kit includes the six-piston caliper, the backing plate with its park brake shoe assembly, the pre-assembled two-piece rotor, and the stainless braided hoses with hardware.
Not included: park brake cables, lug nuts and a front rotor.
