Overview
The Baer Brakes 4302332FR is a Fire Red SS4 rear brake system pairing a four-piston S4 caliper with a 12 inch, 1-piece slotted, drilled, zinc-plated rotor. The kit is intended for rear axles using a GM small pattern 10/12 bolt bearing-on-axle flange with a 5×4.75/5×5.00 wheel bolt pattern.
Inside the backing plate sits the 1-piece park brake shoe assembly, and the caliper mounts to that same plate. Pad types are DR1 or HB100. The dust and weather seals are T compliant, and stainless braided hoses come with the kit.
Key features
- Four-piston S4 caliper made in Phoenix, AZ
- Forged or billet aluminum, CNC machined in the USA
- Powder coated finish
- Hard anodized pistons and stainless abutments
- Dual seals for dust, weather and pressure
- 1-piece slotted, drilled, zinc-plated rotor
- Braided stainless hoses
Things to check
Before the first drive, confirm that the hose routing clears moving suspension parts through full travel. Braided lines can rub if routed close to springs, links or the axle housing, so a slow bounce check with the wheels on the ground is worth doing. Make sure the wheel and tire combination leaves room around the caliper.
Pads need bedding before they deliver full stopping power. A series of moderate stops at speed, followed by a cool-down period, transfers an even layer of friction material onto the rotor. Until bedding is complete, avoid hard stops and watch for fade on long descents. Torque checks on the wheel fasteners are also a good habit after the first use.
- Confirm hose clearance at full suspension travel
- Bed in pads with moderate stops
- Re-check lug nut torque after initial use
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302332FR |
| UPC | 90127952139 |
| Caliper | S4, four-piston, fixed |
| Caliper color | Fire Red |
| Rotor outside diameter | 12.0 inch |
| Rotor type | 1-piece, vented, slotted, drilled, zinc plated |
| Rotor thickness | 1.02 |
| Axle | Rear |
| Axle flange | GM small pattern 10/12 bolt |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 lug |
| Minimum wheel diameter | 16.0 inch |
| Brake hose | Steel braided, DOT approved |
| Park brake | Included, 1-piece shoe assembly |
| Template | S113E |
| Grade type | Performance |
| Emission code | 6 |
| Country of origin | USA |
Vehicle fitment
The kit is built for rear axles, with a GM small pattern 10/12 bolt bearing-on-axle flange and 5×4.75/5×5.00 wheel bolts. The S113E template is the check for match before fitting.
Confirm your vehicle’s year, model and trim before ordering. Baer cannot guarantee fit across every wheel style, so compare the template with the wheel you intend to run.
Installation notes
Rotor thickness is 1.02, and with a 16.0 inch minimum wheel diameter the S113E template should be compared with the wheel first. The park brake shoe assembly is part of the backing plate. Verify that the hose routing clears suspension travel before the first drive.
What’s included
The kit includes the S4 caliper, the 12 inch 1-piece rotor, the backing plate with its park brake shoe assembly, and stainless braided hoses.
Not included: park brake cables.
