Overview
The Baer Brakes 4302438R is a red SS4 Plus rear brake kit designed for rear ends using a GM small pattern 10/12 bolt bearing-on-axle arrangement with flush mount bearing housing ends. Its 4-piston S4 caliper squeezes a 13 inch vented, two-piece rotor on a 5×4.75/5×5.00 bolt pattern.
Baer pre-assembles the rotors with NAS high grade stainless hardware. The unique backing plate acts as the caliper mount and holds a modern one-piece park brake shoe assembly. The kit also includes stainless braided hoses and matching hardware, and the 13 inch SS4 Plus is said to suit most wheels that are 17 inch or larger.
Drivers wanting a red-caliper rear brake with a DR1-C pad type, T compliant seals and a built-in park brake will find the specifics below.
Key features
- Two-piece, 4-piston S4 caliper made in Phoenix, AZ
- CNC-machined body from forged or billet aluminum
- Hard anodized aluminum pistons with stainless steel abutments
- Powder-coated red finish
- T compliant dust and weather seals plus dual pressure seals
- Two-piece slotted, drilled, zinc-plated vented rotor with billet aluminum hat
- Stainless braided hoses and hardware included
Pad type and seals
Pad type is part of the braking setup, not an afterthought. Pads should match the rotor and the driving style, and they should be checked for wear at each service. Seals keep dust, water and grit away from the pistons, and their condition affects how smoothly the caliper stays free. Inspect the seal area after wet or muddy trips and clean away debris before it works into the bore.
Brake fluid is the other part of the system that needs attention. It absorbs moisture over time, which lowers its boiling point and can change pedal feel under heavy use. Replace fluid at regular intervals and whenever hydraulic lines are opened. When pads are replaced, check that the caliper mounting hardware is secure and free of corrosion.
- Check pad wear at every service
- Inspect seals after wet or muddy trips
- Replace brake fluid at regular intervals
- Keep caliper mounting hardware clean and tight
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302438R |
| UPC | 844165049586 |
| Supplied as | Kit |
| Axle | Rear |
| Caliper | S4, 4-piston, fixed |
| Caliper color | Red |
| Piston material | Hard anodized aluminum |
| Abutments | Stainless steel |
| Rotor outside diameter | 13.0 Inch |
| Rotor construction | Vented, two-piece |
| Rotor surface | Slotted, drilled and zinc plated |
| Rotor thickness | 0.81 |
| Axle flange | GM small pattern 10/12 bolt with flush mount bearing |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 |
| Minimum wheel diameter | 17.0 Inch |
| Pad FMSI number | DR1-C |
| Hose | Steel braided, DOT approved |
| Includes park brake | Yes |
| Includes park brake cables | No |
| Template | S135H |
| Grade | Performance |
| Emission code | 6 |
| Country of origin | USA |
Vehicle fitment
The kit is built for rear ends with a GM small pattern 10/12 bolt axle flange and flush mount bearing housing. Verify the flange and 5×4.75/5×5.00 bolt pattern on your axle before ordering.
The 13 inch SS4 Plus suits most wheels 17 inch or larger. Compare template S135H with the wheel you plan to use, since fit in every wheel style is not assured.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Park brake cables are not part of this kit, so the integrated park brake shoe assembly will need cabling sourced to match your setup. The rotors arrive with stainless hardware already fitted. Brakes are safety equipment, so have a qualified technician install and test the system.
What’s included
The kit includes stainless braided hoses and hardware, rotors with NAS high grade stainless hardware, and the one-piece park brake shoe assembly.
Not included: Park brake cables.
