Overview
The Baer Brakes Extreme Plus rear brake system in Comp Yellow, part number 4302471CY, is a kit for 2WD Chevrolet and GMC C10 trucks from 1960 through 1988, including the R10 and R1500 Suburban versions. The main parts are a one-piece six-piston monoblock caliper and a 14 inch two-piece vented, slotted rotor, both built for a 5-lug, 5×5.00 wheel pattern.
Baer machined the caliper body from 2618 aluminum forging and powder coated it, with stainless pistons that stagger to even out pad wear. The backing plate carries a modern one-piece park brake shoe assembly, and the pre-assembled rotors use NAS high grade stainless fasteners. Stainless braided hoses and hardware come with the kit.
Key features
- One-piece monoblock caliper with six pistons, designated 6S
- Caliper body CNC machined from US-sourced 2618 aluminum forging
- Stainless steel pistons, abutments and noise suppression clips
- Dual seals for dust, weather and pressure
- Two-piece slotted, drilled, zinc plated rotor with billet aluminum hat
Things to check
Before installing a rear disc kit, inspect the axle flange, bearings and brake line routing. Any bent or corroded component should be fixed before the new parts go on, since a worn axle or loose bearing can cause pads to wear unevenly and rotors to run out of true. Clean mounting surfaces and fresh fasteners help the new parts seat correctly.
Cable routing is another point to check. The park brake shoes work through cables that run along the frame, and worn or kinked cables can stop the lever from holding the truck. Replacing cables while the rear is apart costs little compared with a second trip under the truck.
- Inspect axle bearings for play
- Check brake lines for corrosion and kinks
- Confirm that cables route freely along the frame
- Torque lug nuts after the first few drives
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302471CY |
| UPC | 90127878231 |
| Sold as | Kit |
| Caliper | 6S one-piece monoblock |
| Caliper color | Comp Yellow |
| Piston quantity | 6 |
| Caliper type | Floating |
| Caliper material | 2618 aluminum forging, CNC machined |
| Caliper finish | Powder coated |
| Rotor outside diameter | 14.0 inch |
| Rotor thickness | 1.25 |
| Rotor construction | Vented |
| Rotor type | 2-piece, slotted, drilled, zinc plated |
| Rotor hat | Billet aluminum |
| Pad FMSI number | D1247 |
| Template | N135P |
| Minimum wheel diameter | 18.0 inch |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 |
| Drive | 2WD |
| Axle | Rear |
| Hose material | Stainless steel |
| Includes park brake | Yes |
| Includes park brake cables | No |
| Grade type | Performance |
| Emission code | 6 |
| Country of origin | USA |
Vehicle fitment
It fits 1960–1986 Chevrolet C10 and its 1967–1986 Suburban, 1987 Chevrolet R10 and 1987–1988 R10 Suburban, 1966 GMC 1000 and 1960–1965 GMC 1000 Series, 1975–1978 GMC C15 Suburban, 1967–1974 GMC C15/C1500 and Suburban, 1979–1986 GMC C1500 Suburban, 1987–1988 GMC R1500 Suburban, and 1960–1966 GMC Suburban.
Trucks built after 1988 and vehicles outside these entries are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Plan for wheel clearance first: the 14 inch rotor is made for wheels of 18 inch minimum diameter, and Baer’s template N135P is the reference for checking a wheel of choice. The park brake shoes are inside the backing plate, but the cables are not included. Test the park brake and the service brakes before regular driving.
What’s included
The kit comes with the one-piece monoblock 6-piston caliper, the pre-assembled two-piece rotors with stainless hardware, the backing plate and its park brake shoe assembly, plus stainless braided hoses and hardware.
Not included: park brake cables.
