Overview
The Baer Brakes 4302504CY is a rear disc brake system for 1960-1986 Chevrolet C10 and GMC C15 trucks, built around a 6-piston caliper and a 14-inch two-piece slotted, drilled rotor in Comp Yellow. Baer names it the Pro Plus 14.0 Inch Brake System, and it is made for the rear axle of 2WD trucks.
The backing plate carries the caliper and houses a one-piece park brake shoe assembly, so the parking brake is built into the same unit. Rotors come pre-assembled with NAS high-grade stainless hardware. The rotor is sized for wheels 18 inches and up, but wheel styles vary, so check clearance with the template before mounting.
Key features
- Two-piece 6-piston (6P) floating caliper, made in Phoenix, Arizona
- CNC-machined aluminum components cut from US-sourced forged or billet stock
- Powder-coated Comp Yellow finish
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons designed to reduce uneven pad wear
- Dual seals against dust, weather and pressure
- Slotted, drilled, zinc-plated two-piece rotor with a billet aluminum hat
- Braided brake hoses, DOT approved, with stainless hardware
How the rear disc works
On a rear disc setup, the caliper clamps a rotor mounted on the axle hub, and the pads apply friction to slow the wheel. A rotor with slots and drilled holes is designed to shed water, dust and heat, which helps the pads keep contact during repeated stops.
Because the parking brake here is part of the backing plate, the rear unit handles both service and park functions. That makes the rotor, pads and shoe assembly work as one system, so wear on any part can affect the others. Keep the brake fluid clean and inspect the lines at each service visit.
- Look for scoring or uneven wear on the rotor face
- Check pad thickness on both sides of each caliper
- Confirm the rotor hat and hardware are tight after the first drives
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302504CY |
| UPC | 90127879030 |
| Caliper | 6-piston (6P), floating |
| Caliper color | Comp Yellow |
| Rotor outside diameter (rear) | 14.0 inch |
| Rotor thickness | 1.15 |
| Rotor type | 2-piece, slotted, drilled, zinc plated, vented |
| Lug count | 6 lug |
| Wheel bolt pattern | 6×5.50 |
| Minimum wheel diameter | 18.0 inch |
| Brake pad FMSI number | D0731 |
| Template | Q135P |
| Drive | 2WD |
| Axle | Rear |
| Park brake | Included; park brake cables not included |
| Brake hose | DOT approved |
| Country of origin | USA |
Vehicle fitment
It fits 1960-1986 Chevrolet C10 and 1967-1986 Chevrolet C10 Suburban, 1987 Chevrolet R10 and 1987-1988 Chevrolet R10 Suburban, 1966 GMC 1000 and 1960-1965 GMC 1000 Series, 1975-1978 GMC C15 Suburban, 1967-1974 GMC C15/C1500 and C15/C1500 Suburban, 1979-1986 GMC C1500 Suburban, 1987-1988 GMC R1500 Suburban, and 1960-1966 GMC Suburban.
1987 Chevrolet C10 pickups and non-Suburban GMC pickups from 1979 to 1988 are not on the list, even though the product name refers to 1960-1987 C10 trucks. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Rotors arrive with stainless hardware already pre-assembled. Use the Q135P template to check clearance against your wheel before mounting, because wheel styles vary. Park brake cables are not included, so arrange them separately. Brake work is safety-critical, so have a qualified technician install and test the system.
What’s included
The kit includes the 6P caliper, the backing plate with its one-piece park brake shoe assembly, two-piece rotors pre-assembled with stainless hardware, and braided brake hoses with stainless hardware.
Not included: park brake cables.
