Overview
The Baer Brakes Extreme Plus rear brake system in Hugger Orange, part number 4302471HO, is a complete rear disc kit for Chevrolet and GMC C10-series trucks built from 1960 to 1988. Each kit pairs a six-piston monoblock caliper with a two-piece, 14 inch slotted rotor, and it is made for 2WD trucks with a 5-lug, 5×5.00 bolt pattern.
The caliper is CNC machined from a 2618 aluminum forging and powder coated, with stainless steel pistons arranged in a staggered layout. Its backing plate doubles as the caliper mount and holds a modern one-piece park brake shoe assembly, and the rotors come pre-assembled with NAS high grade stainless hardware.
Key features
- Six-piston one-piece monoblock caliper designated 6S, made in Phoenix, AZ
- Caliper machined from 2618 aluminum forging with a powder coated finish
- Stainless steel pistons, abutments and noise suppression clips
- Staggered piston arrangement to reduce uneven pad wear
- Dual seals for dust, weather and pressure
- Slotted, drilled, zinc plated two-piece rotor with billet aluminum hat
Choosing the right setup
Rear disc conversions work best when the wheels, rotor and caliper are chosen together. Wheel offset and backspacing decide how much room the caliper has, so check clearance before mounting tires. Tire size also changes the load and leverage on the hub, which affects how hard the pads have to work on a loaded truck.
Upgrading the front brakes at the same time keeps the stopping balance even, and fresh fluid and hoses help the system respond the same way every time. Wheel studs are worth inspecting whenever the wheels come off, since loose or bent studs can cause vibration that feels like brake trouble.
- Confirm wheel clearance with the template before buying tires
- Match pad compound to how the truck is used
- Replace brake fluid on a regular schedule
- Inspect wheel bearings during any rotor job
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302471HO |
| UPC | 90127878309 |
| Sold as | Kit |
| Caliper | 6S one-piece monoblock |
| Caliper color | Hugger Orange |
| Piston quantity | 6 |
| Caliper type | Floating |
| Caliper material | 2618 aluminum forging |
| Caliper finish | Powder coated |
| Rotor outside diameter | 14.0 inch |
| Rotor thickness | 1.25 |
| Rotor construction | Vented |
| Rotor type | 2-piece |
| Rotor surface | 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, 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 with Suburban, 1979–1986 GMC C1500 Suburban, 1987–1988 GMC R1500 Suburban and 1960–1966 GMC Suburban. Vehicles built after 1988, including newer C/K trucks, fall outside this range. Confirm your vehicle’s year, model and trim before ordering.
Vehicles built after 1988, including newer C/K trucks, are not on the list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Wheel fit is the main variable here. Baer recommends using template N135P to compare the rotor and caliper against your chosen wheel, since it cannot guarantee fit with every wheel style. The park brake shoes sit inside the backing plate, but cables must be supplied separately and the park brake should be verified before driving.
What’s included
Included: the 6S one-piece monoblock caliper with six pistons, the two-piece slotted and drilled rotors pre-assembled with stainless hardware, the backing plate with a one-piece park brake shoe assembly, and stainless braided hoses with hardware.
Not included: park brake cables.
