Overview
The Baer Brakes Pro Plus 13.0-inch rear brake kit in Monster Green, part number 4302344MG, is a complete rear disc system for rear axles with the GM small pattern 10/12 bolt flange and a flush mount bearing, bearing on axle (BOA), and a 5×4.75/5×5.00 wheel bolt pattern. Verify the vehicle’s year, model and trim prior to purchase.
A six-piston fixed 6P caliper clamps a 13.0-inch vented rotor. Baer machines the caliper from forged or billet aluminum and powder coats it in Monster Green. The backing plate serves as the caliper mount and houses a one-piece park brake shoe assembly, and braided hoses and hardware are included.
Key features
- Fixed six-piston 6P caliper in Monster Green
- Staggered pistons designed to reduce uneven pad wear
- Dual seals for dust, weather and pressure
- Two-piece slotted, drilled, zinc-plated 13.0-inch vented rotor with billet aluminum hat
- Backing plate serves as caliper mount and houses one-piece park brake shoe assembly
- Braided hoses and hardware included
- FMSI D0731 pad type
Matching the axle flange
Axle compatibility comes down to the flange, not just the wheel. A GM small pattern 10/12 bolt flange with flush mount bearing has a specific bolt layout, and the backing plate must sit square against it. Measuring an existing axle or comparing it with a known housing before ordering prevents a return. Bearing on axle designs keep the bearing on the shaft, so a housing swap or hub change can change which layout applies.
Park brake setup is the other half of the job. The shoe assembly is built into the backing plate, but cables must be sourced and routed separately. Inspect them for stretch, corrosion and free movement before the new plate goes in, and plan to check pads and rotors at each service interval.
- Measure flange bolt layout and bearing type
- Confirm the 5×4.75/5×5.00 wheel pattern
- Source park brake cables before assembly
- Check rotor and pad wear at each service
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302344MG |
| UPC | 90127952610 |
| Sold as | Kit |
| Axle | Rear |
| Caliper | 6P, fixed, 6-piston |
| Caliper color | Monster Green |
| Caliper material | CNC machined from forged or billet aluminum, powder coated |
| Front rotor outside diameter | 13.0 inch |
| Rear rotor outside diameter | 13.0 inch |
| Rear rotor construction | Vented |
| Rotor type | 2-piece slotted, drilled, zinc plated, billet aluminum hat |
| Rotor thickness | 1.1 |
| Pad type | FMSI D0731 |
| Axle flange | GM small pattern 10/12 bolt, flush mount bearing |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 lug |
| Minimum wheel diameter | 17.0 inch |
| Park brake | Included |
| Park brake cables | Not included |
| Brake hose DOT approved | Yes |
| Grade type | Performance |
| Template | Q110H |
| Country of origin | USA |
Vehicle fitment
The kit is for rear axles with a GM small pattern 10/12 bolt flange, a flush mount bearing and a 5×4.75/5×5.00 wheel pattern. It is designed to suit most wheels 17 inch or larger.
Compare the axle flange and wheel pattern against your axle, then verify the year, model and trim for your vehicle.
Installation notes
The backing plate is the caliper mount, so the axle flange must match its layout. Park brake cables are not part of this kit. Brake work should be handled by someone experienced with rear disc and park brake systems.
What’s included
Monster Green 6P fixed caliper, two-piece 13.0-inch rotors, the backing plate with its one-piece park brake shoe assembly, and braided hoses with hardware.
Not included: Park brake cables.
