Overview
The Baer Brakes 4302339R is a red SS4 Plus rear brake system kit for 1960 to 1987 Chevrolet and GMC C10 2WD trucks with large pattern 10/12 bolt C-clip housing ends and a 5 lug, 5×5 inch bolt circle. It centers on a four-piston S4 caliper clamping a 13 inch, two-piece slotted, drilled and zinc-plated rotor, and it is sold as a complete kit.
Baer’s backing plate mounts the caliper and houses a modern one-piece park brake shoe assembly. The 13 inch SS4 Plus suits most wheels 17 inches or larger, and the caliper is finished in red.
Key features
- Four-piston S4 caliper, CNC machined from US-sourced forged or billet aluminum
- Hard anodized aluminum pistons with stainless steel abutments and noise suppression clips
- Dual dust, weather and pressure seals, described by Baer as T compliant
- Two-piece slotted, drilled, zinc-plated rotor with a billet aluminum hat
- Backing plate that carries a one-piece park brake shoe assembly
- Stainless braided, DOT approved hoses with NAS high grade stainless hardware
- Powder coated finish with a red caliper
Before you buy
Start with the axle, because the rotor and backing plate only work when the housing ends match. A large pattern 10/12 bolt C-clip housing with a 5 lug, 5×5 inch bolt circle is the reference point. Once the axle is confirmed, check wheel clearance: rotor size, caliper width and wheel offset decide whether the wheel sits cleanly over the red caliper. Hub-mounted rotors also need clean mating surfaces, so remove rust and debris before the rotor goes on.
The park brake shoe in the backing plate depends on its cable and adjustment to work properly. Plan on checking any reused cables for length, routing and corrosion before the first drive, since the cables are not part of the kit.
- Measure the housing ends before ordering
- Check caliper and wheel clearance with the template
- Inspect reused park brake cables for stretch and rust
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302339R |
| UPC | 844165043782 |
| Sold as | Kit |
| Caliper | S4, four-piston, floating |
| Caliper color | Red |
| Rotor outside diameter | 13.0 inch |
| Rotor type | 2-piece, vented |
| Rotor style | Slotted, drilled, zinc plated |
| Rotor material | Iron with aluminum hat |
| Rotor thickness | 0.81 |
| Minimum wheel diameter | 17.0 inch |
| Pad type (FMSI) | DR1-C |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 |
| Axle housing flange | C-clip axles, large pattern 10/12 bolt housing ends |
| Brake hose | Steel braided, DOT approved |
| Park brake | Included |
| Template | S135H |
| Emission code | 6 |
| Country of origin | US |
Vehicle fitment
It fits 1960–1986 Chevrolet C10; 1967–1986 Chevrolet C10 Suburban; 1987 Chevrolet R10; 1987–1988 Chevrolet R10 Suburban; 1966 GMC 1000; 1960–1965 GMC 1000 Series; 1975–1978 GMC C15 Suburban; 1967–1974 GMC C15/C1500; 1967–1974 GMC C15/C1500 Suburban; 1979–1986 GMC C1500 Suburban; 1987–1988 GMC R1500 Suburban; and 1960–1966 GMC Suburban. Models from 1989 and later are not covered, and 4WD trucks fall outside this kit.
The list does not cover 1989 and later GM full-size pickups, and the title limits this kit to 2WD trucks, so 4WD versions are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Rotors arrive pre-assembled with NAS high grade stainless hardware, and stainless braided hoses are included. Wheel style can affect fit, so compare the S135H template against your wheel before installation. Brake work is safety-critical, so have a qualified brake technician check the installation before driving.
What’s included
The kit includes the S4 four-piston caliper, two-piece 13 inch rotors pre-assembled with stainless hardware, the backing plate with its park brake shoe assembly, and stainless braided hoses with hardware.
Not included: park brake cables, lug nuts and front rotors.
