Overview
The Baer Brakes 4302342B is a black 14.0 inch rear brake system for GM small pattern 10/12 bolt axles that use a bearing on axle with flush mount bearing housing ends. A six-piston fixed caliper clamps a two-piece slotted, drilled rotor with a zinc-plated surface, and the bolt pattern is 5×4.75/5×5.00.
The backing plate both carries the caliper and holds a one-piece park brake shoe assembly, so the kit combines rear service brake and park brake parts in one package. It is a rear axle kit only, so it suits owners replacing the rear brakes on this flange pattern rather than a front axle upgrade.
Key features
- Black powder coated six-piston 6P caliper
- Stainless steel pistons with abutments and noise suppression clips
- Pistons staggered to even out pad wear
- Dust, weather and pressure dual seals
- Slotted, drilled, zinc-plated two-piece rotor with billet aluminum hat
- Hardware pre-assembled on the rotors with NAS high grade stainless fasteners
- Steel braided, DOT approved hoses with hardware
- Caliper body CNC machined from US sourced forged or billet aluminum in Phoenix, Arizona
Things to check
Start with the axle before comparing caliper features. Rear axle flanges differ in bolt pattern and bearing style, and the rotor and caliper must match the hub the wheels mount to. Confirm the bolt circle against the wheels you plan to run, since spacers or a change in wheel offset can alter clearance.
Once fitment is settled, look at how the park brake will be used. The shoe assembly inside the backing plate works as a parking brake only when cables and adjustment are installed correctly. Torque the caliper bracket bolts to the value in a factory service manual, and recheck them after the first few drives.
- Measure wheel clearance before mounting tires
- Recheck caliper bolts after the first few drives
- Arrange park brake cables before final assembly
- Inspect braided hoses for chafing at each service
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302342B |
| UPC | 844165043928 |
| Color | Black |
| Caliper | 6P, six-piston, fixed |
| Rotor outside diameter | 14.0 inch |
| Rotor construction | Two-piece, slotted, drilled, zinc-plated |
| Rotor material | Iron with aluminum hat |
| Rotor thickness | 1.15 |
| Pad type | D0731 (FMSI) |
| Axle flange | GM small pattern 10/12 bolt with flush mount bearing |
| Axle housing bearing | Hybrid, 3.150 inch bearing on axle |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 |
| Minimum wheel diameter | 18.0 inch |
| Brake hose | Steel braided, DOT approved |
| Park brake included | Yes |
| Park brake cables included | No |
| Lug nuts included | No |
| Front rotor included | No |
| Template | Q110P |
| Country of origin | US |
Vehicle fitment
Fitment is determined by the rear axle. The kit matches a GM small pattern 10/12 bolt flange with a 3.150 inch bearing on axle, a 5×4.75/5×5.00 wheel pattern and wheels of at least 18.0 inch diameter. Confirm fit for your vehicle’s year, model and trim before ordering.
No vehicle, model or model year is named for this kit, so axle and wheel matching is the only way to confirm it. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Rotors come with stainless hardware pre-assembled, so no separate rotor build is needed. Test the Q110P template against your wheel first, because Baer does not guarantee wheel fit for every style. Park brake cables are not part of the kit, so arrange cables before fitting the one-piece park brake shoe assembly.
What’s included
This kit contains the six-piston caliper, the two-piece rotor with stainless hardware, the backing plate with its park brake shoe assembly, and steel braided hoses with their hardware.
Not included: Lug nuts, a front rotor and park brake cables are not in the kit.
