Overview
The Baer Brakes Pro Plus 4302344S is a silver 13.0 Inch rear brake system built for GM small pattern 10/12 bolt rear ends with a bearing on axle (BOA) design and a flush mount bearing housing. It pairs a six-piston, fixed 6P caliper with a 13-inch two-piece slotted, drilled and zinc-plated rotor and covers a 5×4.75/5×5.00 bolt circle.
The backing plate serves as the caliper mount and houses a one-piece park brake shoe assembly. Rotors come pre-assembled with NAS high grade stainless hardware, and stainless braided hoses and hardware are included. The 13-inch rotor fits wheels 17 inches or larger, but wheel fit varies by style, so compare the Q110H template with the wheel before ordering.
Key features
- Two-piece, six-piston 6P caliper manufactured in Phoenix, Arizona
- CNC-machined body from forged or billet aluminum
- Powder coated finish with stainless steel pistons, abutments and noise suppression clips
- Staggered pistons to reduce uneven pad wear
- Dual seals for dust, weather and pressure
- DOT approved stainless braided hoses included
- Park brake shoe assembly built into the backing plate
Axle compatibility checks
Rear axle design decides whether a brake kit will bolt up cleanly, so confirm the axle before any other step. Bearing on axle (BOA) setups carry the wheel bearing on the axle shaft and retain it at the flange, while other designs use a separate hub and bearing. A flush mount bearing housing changes how the backing plate seats, so check the mounting face before fitting the rotor.
Bolt pattern matters as much as axle type. Compare the wheel studs and hub face with the stated pattern before ordering, and confirm the wheel clears the rotor and caliper. Park brake cables are a separate purchase, so measure the existing cable run and plan replacements before disassembly.
- Count studs and measure the bolt circle before ordering
- Inspect the axle flange for cracks or wear
- Replace the axle seal during the rebuild
- Check that the backing plate sits flat against the housing
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302344S |
| UPC | 844165044062 |
| Caliper | 6P, six-piston, fixed |
| Caliper color | Silver |
| Rotor outside diameter | 13.0 Inch |
| Rotor thickness | 1.1 |
| Rotor type | 2-Piece |
| Rotor material | Iron with aluminum hat |
| Surface type | Slotted, drilled and zinc plated |
| Pad FMSI number | D0731 |
| Template | Q110H |
| Minimum wheel diameter | 17.0 Inch |
| Lug count | 5 Lug |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Axle flange | GM small pattern 10/12 bolt, hybrid, 3.150 Inch bearing on axle, flush mount |
| Hose material | Steel braided |
| Brake hose DOT approved | Yes |
| Includes park brake | Yes |
| Includes park brake cables | No |
| Grade type | Performance |
| Country of origin | US |
Vehicle fitment
It is built for rear ends with GM small pattern 10/12 bolt axle flanges, a flush mount bearing housing and a 5×4.75/5×5.00 wheel pattern, so axle type and bolt pattern are the key checks. Confirm fit for your vehicle’s year, model and trim before ordering.
Check your axle flange, bolt pattern and bearing type against the specifications above before ordering. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The backing plate is supplied with the kit and doubles as the caliper mount while housing the one-piece park brake shoe assembly. Park brake cables are not included and must be sourced separately. Check the Q110H template against your wheel before mounting. Rear brake work should be done by a qualified technician, since the park brake and braided hoses are part of the braking system.
What’s included
The kit includes the 6P caliper, two-piece 13.0 Inch rear rotors with billet aluminum hats, pre-assembled NAS high grade stainless rotor hardware, the backing plate with its one-piece park brake shoe assembly, and stainless braided hoses with hardware.
Not included: park brake cables and front rotors.
