Overview
The Baer Brakes Extreme Plus Brake System in Monster Green, part number 4302471MG, is a complete rear disc brake kit for 2WD Chevrolet and GMC C10-series trucks from 1960 through 1988. The kit centers on a one-piece, six-piston monoblock caliper (6S) that clamps a 14 inch two-piece rotor, and it is built for trucks with a 5-lug, 5×5.00 wheel bolt pattern.
Baer’s backing plate serves as the caliper mount and also houses a modern one-piece park brake shoe assembly. The rotors arrive pre-assembled with NAS high grade stainless hardware, and stainless braided hoses and hardware are included. The 14 inch rotor suits wheels of 18 inch diameter or larger, and the pad type referenced is the popular D1247.
Key features
- One-piece monoblock 6-piston 6S caliper, manufactured in Phoenix, AZ
- Caliper body CNC machined from a US-sourced 2618 aluminum forging
- Powder coated finish on the caliper
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons to help minimize uneven pad wear
- Dual dust, weather and pressure seals
- Two-piece slotted, drilled, zinc plated vented rotor with billet aluminum hat
Before you buy
A rear disc conversion changes how the whole axle end behaves, so the caliper, rotor, pads and backing plate should be judged as one system. A six-piston caliper clamps with more force and spreads pressure across the pad, which makes the pad compound and rotor surface worth matching to the truck’s weight and how it is driven. Trucks that tow or run long grades put more heat into the rotor and fluid, so the hoses, fluid and bleeding procedure matter as much as the caliper.
The park brake shoes sit inside the backing plate, which means the cable run from the lever to the rear is often the first part to stretch, corrode or bind. Cables, return springs and adjusters are commonly replaced in the same job so the park brake holds on an incline and releases fully.
- Check pad thickness and rotor condition at every brake service
- Inspect braided hoses for chafing near the frame and axle
- Bleed the system after any hose or caliper work
- Replace park brake cables that feel stretched or sticky
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302471MG |
| UPC | 90127878330 |
| Sold as | Kit |
| Caliper | 6S one-piece monoblock |
| Caliper color | Monster Green |
| 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
Baer’s manufacturer fitment list for this kit names 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 its Suburban, 1979–1986 GMC C1500 Suburban, 1987–1988 GMC R1500 Suburban, and 1960–1966 GMC Suburban.
Trucks built after 1988 and 4-wheel-drive models are not part of this list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Check wheel clearance before mounting: Baer recommends matching template N135P against the intended wheel, because wheel styles vary and fit cannot be guaranteed for every design. Park brake cables are not included, so the park brake must be connected and tested before the truck is driven on public roads.
What’s included
The kit includes the one-piece monoblock 6-piston 6S caliper, two-piece slotted and drilled zinc plated rotors pre-assembled with NAS stainless hardware, the backing plate with its one-piece park brake shoe assembly, and stainless braided hoses and hardware.
Not included: park brake cables.
