Overview
The Baer Brakes 4302340MG is an SS4 Plus rear disc brake system for 60-87 Chevy and GMC C10 2WD trucks, built with a 6 lug 6×5.50 inch bolt pattern and OE large pattern 10/12 bolt C-clip housing ends. It is a complete rear setup centered on a 4-piston S4 floating caliper finished in Monster Green and a 13 inch two-piece slotted, drilled rotor.
The backing plate carries the caliper and also houses a one-piece park brake shoe assembly, so the parking brake comes with the rear unit. Rotors arrive pre-assembled with stainless hardware, and braided brake hoses with hardware are included. The caliper uses DR1-C pads, and the listed minimum wheel diameter is 17.0 inch.
Key features
- 2-piece, 4-piston S4 caliper made in Phoenix, Az
- Floating caliper design with powder coated finish
- CNC machined from forged or billet aluminum
- Hard anodized aluminum pistons with stainless steel abutments
- Dual seals for dust, weather and pressure
- 2-piece slotted, drilled, zinc-plated rotor on a billet aluminum hat
- Integrated one-piece park brake shoe assembly
- Braided brake hoses with DOT approval
Conversion planning
Fitting a disc rear end to an older truck involves more than swapping the rear brake parts. The front brakes, master cylinder and proportioning valve all affect how the rear brakes behave, so review the whole system before driving on the road. Older trucks often have worn drums, aging brake lines and a hydraulic setup designed around drum brakes.
Trail and highway use place different demands on a rear disc setup. A slotted, drilled rotor sheds heat and water well, but the pads still need to match the caliper and the driving you do most. Plan to inspect the hub bearings and seals while the rear is apart.
- Master cylinder capacity reviewed for disc rear brakes
- Brake lines checked for corrosion and flex
- Proportioning valve reviewed during conversion
- Hub bearings and seals inspected while apart
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302340MG |
| UPC | 90127879382 |
| Caliper | S4, 4-piston, floating |
| Caliper color | Monster Green |
| Pad FMSI number | DR1-C |
| Rotor outside diameter | 13.0 inch |
| Rotor type | 2-piece, vented |
| Rotor thickness | 0.81 |
| Rotor surface | Slotted, drilled and zinc plated |
| Minimum wheel diameter | 17.0 inch |
| Lug count | 6 lug |
| Wheel bolt pattern | 6×5.50 |
| Axle flange | OE Large Pattern 10/12 Bolt C-clip housing ends |
| Axle | Rear |
| Drive | 2WD |
| Brake hose DOT approved | Yes |
| Park brake shoe | Included |
| Park brake cables | Not included |
| Template | S135H |
| Grade | Performance |
| Country of origin | USA |
Vehicle fitment
The kit fits these Chevrolet and GMC trucks:
- 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
- 1960–1966 GMC Suburban
Models not on this list, such as 4WD K-series trucks and later C/K pickups, are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The 13 inch rotor needs wheel clearance, so use the S135H template to check your wheel against the caliper before mounting. The minimum wheel diameter is 17.0 inch. The cables for the park brake are not part of the set. A qualified technician should handle the install and brake bleed.
What’s included
The set includes the S4 caliper, the 13 inch two-piece rotor, the backing plate with its park brake shoe assembly, braided brake hoses, and the stainless hardware for the rotors and hoses.
Not included: park brake cables.
