Overview
The Baer Brakes 4302470HO is an Extreme Plus rear disc brake kit in Hugger Orange for Chevrolet C10 and GMC C/R-series 2WD trucks from 1960 through 1988. Its housing ends follow the OE large pattern 10/12 bolt C-clip design, and the system is built for 6 lug, 6×5.5 inch wheels.
The 6S caliper is a one-piece monoblock with six pistons, and it clamps a 14 inch two-piece rotor that is slotted, drilled and zinc plated. The backing plate doubles as the caliper mount and holds a modern one-piece park brake shoe assembly. Stainless braided hoses, NAS stainless hardware and pre-assembled rotors come with the kit.
Key features
- Machined from US-sourced 2618 aluminum forging, then powder coated
- Six-piston monoblock caliper manufactured in Phoenix, Arizona
- Stainless pistons, abutments and noise suppression clips
- Staggered piston layout to minimize uneven pad wear
- Dual dust, weather and pressure seals
- Slotted, drilled, zinc-plated two-piece rotor on a billet aluminum hat
- Stainless braided hose set with stainless hardware
Matching pads and wheels
Pad choice matters more on a rear disc conversion than many buyers expect. The pad compound needs to suit the rotor material and the way the truck is driven, whether that means street use, towing or trail trips with frequent stops. A pad that grabs too hard can overheat a rear rotor, while a soft compound may fade on long grades.
Wheel choice is part of the same setup. A larger wheel gives more room around the caliper and rotor, but offset and backspacing still decide whether the wheel clears the caliper body. Test-fit the wheel before final torque, and rotate the assembly by hand to confirm there is no rubbing at full lock.
- Choose pads rated for the driving you do most
- Check wheel offset against the caliper body
- Bed new pads before towing or steep descents
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302470HO |
| UPC | 90127878965 |
| Caliper | 6S one-piece monoblock, six pistons, floating |
| Caliper color | Hugger Orange |
| Caliper material | CNC machined 2618 aluminum forging, powder coated |
| Rotor outside diameter | 14.0 inch |
| Rotor type | 2-piece, slotted, drilled, zinc plated |
| Rotor construction | Vented |
| Rotor thickness | 1.25 |
| Hat | Billet aluminum |
| Minimum wheel diameter | 18.0 inch |
| Brake pad | FMSI D1247 |
| Template | N135P |
| Lug count | 6 lug |
| Bolt pattern | 6×5.50 inch |
| Hose material | Stainless steel |
| Park brake | Included; park brake cables not included |
| Drive | 2WD |
| Axle | Rear |
| Country of origin | USA |
| Sold as | Kit |
Vehicle fitment
It fits 1966 GMC 1000 and 1960–1965 GMC 1000 Series trucks, 1960–1986 Chevrolet C10 and 1967–1986 C10 Suburban, 1987 Chevrolet R10 and 1987–1988 R10 Suburban, 1975–1978 GMC C15 Suburban, 1967–1974 GMC C15/C1500 with its Suburban version, 1979–1986 GMC C1500 Suburban, 1987–1988 GMC R1500 Suburban, and 1960–1966 GMC Suburban.
Trucks outside that list are not covered, including four-wheel-drive models and GMC C/K trucks after 1987 other than the R1500 Suburban entry. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Because the 14 inch rotor needs 18 inch or larger wheels, measure your wheel clearance before bolting this kit on. Baer recommends the N135P template for that comparison. Park brake cables are not included. Have a qualified technician perform the installation, since rear brake errors can be dangerous.
What’s included
The package covers the 6S caliper, the pre-assembled two-piece rotors with NAS stainless hardware, the backing plate with park brake shoe assembly, and stainless braided hoses.
Not included: park brake cables.
