Overview
The black Baer Brakes 4302298B is an SS4 rear brake kit for GM small pattern 10/12 bolt rear housings that use C-clip axles. A 4-piston S4 caliper clamps a 12 inch, 1-piece slotted and drilled rotor, and the kit fits 5 lug wheels on a 5×4.75/5×5.00 bolt pattern.
Behind the caliper, the backing plate supports a 1-piece park brake shoe assembly, so one plate handles both service braking and parking. The pads follow the DR1 or HB100 family, with FMSI number DR1-C, and dust and weather seals guard the caliper. Braided hoses come with the kit.
Key features
- Black S4 caliper with 4-piston design, built in Phoenix, Az
- Caliper body CNC machined from U.S. sourced forged or billet aluminum
- Powder coated finish
- Hard anodized aluminum pistons, stainless steel abutments and noise suppression clips
- Dual seals rated for dust, weather and pressure
- 12.0 inch 1-piece slotted, drilled, zinc plated rotor
- Backing plate with integrated 1-piece park brake shoe assembly
- Floating caliper type
Matching wheels and axle parts
A rear disc kit only works as well as the axle assembly it bolts to. Confirm the housing is a C-clip design before ordering, then check the axle bearings, seals and hub bolts for wear. A loose or leaking axle can affect braking even when the caliper is new, so replace worn axle components while the housing is open.
Wheel choice matters just as much. Backspacing and offset decide how close the wheel sits to the caliper and rotor, and a spacer or aftermarket wheel can change that clearance. Tire size and wheel weight also add load on the brakes, so keep them in mind when planning for steep descents.
- Inspect axle bearings and seals
- Check wheel backspacing against the caliper
- Use one brake fluid type throughout the system
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302298B |
| UPC | 844165028796 |
| Product type | Rear brake system kit |
| Caliper | S4, 4-piston, floating |
| Caliper color | Black |
| Rotor outside diameter | 12.0 inch |
| Rotor type | 1-piece, vented |
| Rotor surface | Slotted, drilled and zinc plated |
| Rotor material | Iron |
| Rotor thickness | 1.02 |
| Axle flange | GM 10/12 bolt C-clip (small car pattern) |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 lug |
| Minimum wheel diameter | 16.0 inch |
| Pad FMSI number | DR1-C |
| Park brake | Included, 1-piece shoe assembly |
| Emission code | 6 |
| Grade type | Performance |
| Country of origin | US |
Vehicle fitment
It is built for GM small pattern 10/12 bolt rear housings with C-clip axles, which is the axle flange this kit is designed around. Wheel clearance depends on wheel style, so use the S113E template to check the wheel you plan to run.
Bearing-on-axle housings and front axles are not covered by this kit. Confirm fit for your vehicle’s year, model and trim before ordering.
Installation notes
Park brake cables are not included, so the parking function needs cables from a separate source. Test-fit the S113E template against the chosen wheel before mounting, since wheel fit cannot be promised for every style. Hydraulic hoses are part of this rear system, so a qualified installer is the safer choice.
What’s included
Included with the kit are the S4 caliper, the 12.0 inch rotor, the backing plate with its park brake shoe assembly, and braided hoses.
Not included: park brake cables, lug nuts and a front rotor.
