Overview
The Baer Brakes SS4 Plus, part number 4302339HO, is a rear disc brake system in Hugger Orange for 2WD Chevrolet and GMC C10 trucks from 1960 through 1988. It is built for a 5 lug hub with a 5×5.00 wheel bolt pattern and uses large pattern 10/12 bolt C-clip housing ends.
A four-piston S4 caliper clamps a 13 inch two-piece rotor finished slotted, drilled and zinc plated, with a billet aluminum hat. The backing plate serves as the caliper mount and holds a modern one-piece park brake shoe assembly. The SS4 Plus suits most 17 inch or larger wheels, so check clearance with the S135H template before mounting.
Key features
- Four-piston S4 caliper, floating type, with dual seals against dust, weather and pressure
- Hard anodized aluminum pistons; stainless steel abutments; noise suppression clips included
- Vented, two-piece 13.0 inch rotor with billet aluminum hat
- Rotor surface is slotted, drilled and zinc plated
- NAS high grade stainless hardware pre-installs the rotors
- One-piece park brake shoe assembly sits inside the backing plate
- Steel braided hoses, DOT approved
- Powder coated finish; made in Phoenix, AZ
Pad choice and break-in
Pad compound affects how quickly the brakes respond when cold and how much heat they handle on a long grade. Street-focused compounds stop smoothly in everyday driving but may fade under sustained load. Matching the pad to how the truck is actually used keeps the caliper and rotor wearing evenly.
New pads and rotors need a break-in period before they reach full friction. Make several moderate stops from moderate speed, letting the brakes cool between them, then avoid heavy stops until the surface settles. Uneven pad deposits can cause a pulse, which usually means the rotor needs resurfacing or replacement.
- Bed in new pads with progressive stops
- Keep brake fluid fresh to resist fade
- Inspect the caliper slide area for corrosion
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302339HO |
| UPC | 90127878705 |
| Kit type | Kit |
| Caliper | S4, four-piston, floating type |
| Caliper color | Hugger Orange |
| Rotor type | Two-piece, vented |
| Rotor outside diameter | 13.0 inch |
| Rotor thickness | 0.81 |
| Rotor surface | Slotted, drilled and zinc plated |
| Rotor hat | Billet aluminum |
| Pad type | DR1-C |
| Brake hose | Steel braided, DOT approved |
| Park brake | Included, one-piece shoe assembly |
| Park brake cables | Not included |
| Minimum wheel diameter | 17.0 inch |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 |
| Axle | Rear |
| Drive | 2WD |
| Template | S135H |
| Emission code | 6 |
| Grade type | Performance |
| Country of origin | USA |
Vehicle fitment
Listed 2WD applications are 1960 to 1986 Chevrolet C10, 1967 to 1986 Chevrolet C10 Suburban, 1987 Chevrolet R10, 1987 to 1988 Chevrolet R10 Suburban, 1966 GMC 1000, 1960 to 1965 GMC 1000 Series, 1975 to 1978 GMC C15 Suburban, 1967 to 1974 GMC C15/C1500 with its Suburban version, 1979 to 1986 GMC C1500 Suburban, 1987 to 1988 GMC R1500 Suburban, and 1960 to 1966 GMC Suburban.
Other GM truck generations and 4WD trucks fall outside this list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Check the 5×5.00 bolt pattern and the 17.0 inch minimum wheel diameter against the hub before fitting. The S135H template is the wheel clearance check Baer recommends. A qualified technician should set up the park brake and bleed the hydraulics after installation.
What’s included
The package covers the S4 caliper assemblies, two-piece rotors, the backing plate with park brake shoe assembly, the stainless braided hoses and the stainless hardware.
Not included: park brake cables.
