Overview
The Baer Brakes 4302249S is a Pro Plus 14-inch rear brake system kit in silver for GM small pattern 10/12 bolt rear axles with C-clip housing ends and a 5×4.75 and 5×5 bolt circle. Its six-piston 6P caliper is a floating design, paired with a two-piece slotted, drilled rotor of 1.15 thickness and the D0731 pad type.
The backing plate doubles as the caliper mount and houses a 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, and wheel styles vary, so check clearance against the Q110P template before fitting.
Key features
- Two-piece six-piston 6P caliper 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 to minimize uneven pad wear
- Dual seals for dust, weather and pressure
- Slotted, drilled, zinc-plated two-piece rotor with billet aluminum hat and NAS high grade stainless hardware
- Stainless braided hoses and hardware included
Keeping the rotors in service
A two-piece rotor with a separate hat relies on the hardware that holds the hub together. Check the hat bolts for tightness after the first drives and whenever the wheels come off, because a loose hat can cause vibration and uneven contact with the pads. Slotted and drilled rotors clear dust and gas faster than plain faces, but the slots also collect debris, so rinse the rotor face after muddy trips.
Rotor wear is best judged by thickness and surface condition rather than by mileage alone. Deep grooves, blue heat marks and a pulsing pedal point to a rotor that needs replacement. When changing the rotor, replace the pads at the same time and bed them in with a few moderate stops. Keep the caliper bracket bolts snug and the hose connections clean so the system stays firm under repeated braking.
- Re-torque the hat fasteners after the first trail run
- Check the pad surface for glazing during service
- Replace rotors in pairs on the same axle
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302249S |
| UPC | 844165043058 |
| Sold as | Kit |
| Axle | Rear |
| Axle flange | GM 10/12 bolt C-clip, small car pattern |
| Wheel bolt pattern | 5×4.75 / 5×5.00 |
| Lug count | 5 lug |
| Caliper | 6-piston 6P, floating |
| Caliper color | Silver |
| 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
The kit is for GM small pattern 10/12 bolt rear axles with C-clip housing ends. Bearing-on-axle housings are a different flange and are not covered. Check your vehicle’s year, model and trim against this flange before ordering.
Bearing-on-axle housings use a different flange and are not what this kit is for. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Rotors arrive pre-assembled, and the kit includes hoses with hardware. Lug nuts and the park brake cables are not part of the kit. Confirm the rear housing ends are the C-clip type, and compare wheel clearance using the Q110P template. Installation should be left to an experienced brake technician, since a brake failure can cause serious crashes.
What’s included
The six-piston caliper, the backing plate with park brake shoe assembly, the pre-assembled two-piece rotor, and stainless braided hoses with hardware.
Not included: the front rotor, lug nuts and park brake cables.
