Overview
The Baer Brakes SS4 rear brake kit in Hugger Orange, part number 4302468HO, is a four-piston rear disc brake system for 1960 to 1987 Chevrolet and GMC C10 2WD trucks with 5 lug, 5×5 inch wheels and large pattern 10/12 bolt C-clip housing ends. The S4 caliper clamps a 12 inch one-piece slotted, drilled, zinc plated rotor.
Baer’s rear backing plate serves as the caliper mount and also holds a one-piece park brake shoe assembly, so parking brake hardware comes built into the package. Braided brake hoses are included, and the pads are the DR1 or HB100 type. Hugger Orange is the powder coated caliper finish.
Key features
- Two-piece S4 caliper with four pistons, made in Phoenix, AZ
- CNC machined from billet or forged aluminum sourced in the US
- Hard anodized aluminum pistons, stainless abutments and noise suppression clips
- Dual seals for dust, weather and pressure
- Vented, one-piece slotted, drilled and zinc plated rotor
- Braided brake hoses with DOT approval
- Park brake shoe assembly included
Brake fluid and bleeding
Fresh brake fluid matters more after a rear disc upgrade because the new caliper adds hydraulic volume and new hose runs. Old fluid absorbs moisture over time, which lowers its boiling point and can soften pedal feel under heavy use. Flushing the system during the job gives a clean starting point for the new components.
Bleeding should follow the sequence that suits the vehicle, starting at the wheel farthest from the master cylinder. Watch for air in the new hoses, and keep the reservoir topped up so air is not pulled back into the lines. Pedal firmness should be checked before the truck leaves the shop and again after a short test drive.
- Use fresh fluid of the type the master cylinder calls for
- Bleed in a consistent order
- Re-check the reservoir level after the first drive
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302468HO |
| UPC | 90127878835 |
| Sold as | Kit |
| Caliper | S4, two-piece, four-piston |
| Caliper color | Hugger Orange |
| Caliper type | Floating |
| Caliper piston quantity | 4 |
| Rotor outside diameter | 12.0 in |
| Rotor construction | Vented, one-piece, slotted, drilled, zinc plated |
| Rotor thickness | 1.02 |
| Pad type | DR1 or HB100 (FMSI DR1-C) |
| Brake hose | Steel braided, DOT approved |
| Park brake | Shoe assembly included; park brake cables not included |
| Drive | 2WD |
| Axle | Rear |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 in |
| Minimum wheel diameter | 16.0 in |
| Fitment notes | w/OE large pattern 10/12 bolt C-clip housing ends |
| Template | S113E |
| Grade type | Performance |
| Country of origin | USA |
Vehicle fitment
The manufacturer list covers 1960-1986 Chevrolet C10 and 1967-1986 C10 Suburban, 1987 and 1987-1988 Chevrolet R10 and R10 Suburban, 1966 and 1960-1965 GMC 1000 series, 1975-1978 GMC C15 Suburban, 1967-1974 GMC C15/C1500 and its Suburban, 1979-1986 GMC C1500 Suburban, 1987-1988 GMC R1500 Suburban, and 1960-1966 GMC Suburban.
The kit is built for 2WD trucks, so four-wheel-drive models are outside this fitment. Years and models not on the list above, such as 1989 and later pickups, are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Before mounting, hold the S113E template against your chosen wheel, since wheel styles vary and Baer cannot promise fit into every wheel. This 12 inch rotor needs a wheel 16 inches in diameter or larger. An experienced brake shop should install the kit and bleed the system once the work is complete.
What’s included
The package comprises the S4 caliper on a 12.0 inch rotor, Baer’s backing plate with a park brake shoe assembly, and braided hoses.
Not included: park brake cables.
