Overview
The Baer Brakes 4302341S is a silver Extreme Plus 14.0 inch rear brake system for GM small pattern 10/12 bolt axles with a bearing on axle and flush mount bearing housing ends. It uses a one-piece monoblock six-piston 6S caliper on a two-piece slotted, drilled, zinc-plated rotor, set up for 5×4.75 and 5×5.00 bolt patterns.
The caliper is machined from a 2618 aluminum forging and is paired with the D1247 pad type. Baer’s backing plate still mounts the caliper and houses a one-piece park brake shoe assembly, so the park brake sits within the same rear package. The listed rotor thickness is 1.25.
Key features
- One-piece monoblock six-piston 6S caliper with powder coated finish
- Caliper CNC machined from US sourced 2618 aluminum forging
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons to reduce uneven pad wear
- Dual dust, weather and pressure seals
- Two-piece slotted, drilled, zinc-plated rotor with billet aluminum hat
- Rotors pre-assembled with NAS high grade stainless hardware
- Stainless steel brake hoses and hardware included
How a monoblock caliper works
A monoblock caliper uses a single body rather than two halves bolted together. That one-piece design reduces the number of joints that can leak and tends to hold its shape under heavy braking. The body is machined from aluminum forging, so it stays relatively light while handling more heat than a basic stamped bracket.
The pads sit inside the caliper, and their friction material must match the FMSI number to clear the pistons and carriers. Before installing new pads, check that the backing shims and hardware are seated correctly. Inspect the boots and seals for signs of fluid, since small leaks at the piston area often show up as a soft pedal rather than a visible puddle.
- Match replacement pads to the FMSI number
- Check piston boots for cracks or fluid
- Clean and lubricate caliper slide pins during service
- Confirm rotor thickness meets the minimum before reuse
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302341S |
| UPC | 844165043898 |
| Color | Silver |
| Caliper | 6S, one-piece monoblock, six-piston, fixed |
| Caliper material | 2618 aluminum forging |
| Rotor outside diameter | 14.0 inch |
| Rotor thickness | 1.25 |
| Rotor construction | Two-piece, slotted, drilled, zinc-plated |
| Rotor material | Iron with aluminum hat |
| Pad type | D1247 (FMSI) |
| Axle flange | GM small pattern 10/12 bolt with flush mount bearing |
| Axle housing bearing | Hybrid, 3.150 inch bearing on axle |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 |
| Minimum wheel diameter | 18.0 inch |
| Brake hose | Stainless steel |
| Park brake included | Yes |
| Park brake cables included | No |
| Lug nuts included | No |
| Front rotor included | No |
| Template | N110P |
| Country of origin | US |
Vehicle fitment
It is built around a GM small pattern 10/12 bolt rear axle flange with a flush mount bearing housing. The Extreme Plus caliper and rotor are matched to 5×4.75/5×5.00 wheels with a minimum diameter of 18.0 inch. Confirm fit for your vehicle’s year, model and trim before ordering.
Match points are the rear axle flange and wheel details above. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Use template N110P to check clearance against the wheel you plan to run, since Baer cannot promise fit with every wheel style. The rotors arrive with stainless hardware pre-assembled. Park brake cables are not included, so they must be obtained for the one-piece park brake shoe assembly before the rear brakes are used.
What’s included
The kit supplies the monoblock caliper, the two-piece rotor with pre-assembled stainless hardware, the backing plate with its park brake shoe assembly, and stainless steel hoses with hardware.
Not included: Lug nuts and park brake cables sit outside this kit, as does a front rotor.
