Overview
The Baer Brakes 4302248CY is a Pro Plus rear disc brake kit for GM rear ends with the small car 10/12 bolt C-clip flange. It pairs a 6-piston 6P floating caliper in Comp Yellow with a 13 inch two-piece slotted, drilled, zinc-plated rotor. Confirm the axle flange and wheel bolt pattern match your vehicle before choosing it.
The caliper is manufactured in Phoenix, Arizona and CNC machined from U.S.-sourced forged or billet aluminum. Baer’s backing plate serves as the caliper mount and also houses a one-piece park brake shoe assembly, so the rear service brake and the park brake share one housing. The kit uses the popular D0731 pad type, and Baer’s template Q110H is the reference for checking wheel fit.
Key features
- 6-piston, 6P floating caliper with staggered pistons to minimize uneven pad wear
- Stainless steel pistons, abutments and noise suppression clips
- Dual dust/weather and pressure seals on the caliper
- 13 inch two-piece slotted, drilled, zinc-plated rotor with a billet aluminum hat
- Rotors pre-assembled with NAS high grade stainless hardware
- Stainless braided brake hoses included
- Powder-coated Comp Yellow caliper finish
Choosing a rear brake upgrade
Converting a rear axle to disc brakes changes more than the rotor and caliper. The axle flange, wheel bearing setup and parking brake all affect how the new hardware sits and works, so measure and compare before buying. A larger rotor also changes the clearance between the caliper and the wheel spokes, which is why a template check is useful.
On the road, a disc rear brake typically reduces fade during repeated stops and gives more consistent pedal feel than worn drum shoes. Off road, mud and water can load the pads quickly, so inspect the caliper boots and pins after each outing. Pairing the rear kit with fresh front pads and fluid keeps braking balanced.
- Measure the axle flange before ordering
- Check wheel clearance with the template
- Replace worn hoses and fluid during install
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302248CY |
| UPC | 90127953204 |
| Sold as | Kit |
| Axle | Rear |
| Axle flange | GM 10/12 bolt C-clip, small car pattern |
| Caliper | 6P, 6-piston floating |
| Caliper color | Comp Yellow |
| Rotor outside diameter | 13.0 inch |
| Rotor type | 2-piece, vented, slotted, drilled, zinc plated |
| Rotor thickness | 1.1 |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 lug |
| Minimum wheel diameter | 17.0 inch |
| Pad FMSI number | D0731 |
| Template | Q110H |
| Brake hose | Steel braided, DOT approved |
| Park brake | Included; park brake cables not included |
| Grade | Performance |
| Country of origin | USA |
Vehicle fitment
The kit is designed for GM rear ends using the small car 10/12 bolt C-clip axle flange with a 5×4.75/5×5.00 wheel bolt pattern. Match your axle and wheels to those specifications, and confirm your vehicle’s year, model and trim before ordering.
Wheel fit is not guaranteed across every wheel style, so compare template Q110H with the wheel before mounting. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The rotors arrive pre-assembled with stainless hardware, and the backing plate carries the park brake shoe. Park brake cables are not included, so confirm the cables on your vehicle work with this park brake setup before installing. Use template Q110H against your wheel before mounting, since the kit fits most wheels 17 inch or larger. Brake work is safety-critical, so bed in the new pads and test the brakes at low speed before driving normally.
What’s included
The kit includes the 6P caliper, the 13 inch two-piece rotors pre-assembled with NAS high grade stainless hardware, the backing plate with a one-piece park brake shoe assembly, and stainless braided hoses and hardware.
Not included: park brake cables.
