Overview
The Baer Brakes Pro Plus front brake system in Monster Green, part number 4301586MG, is a 13 inch two-piece slotted, drilled and zinc plated front disc brake kit with a 6-piston caliper. It is built around 2WD 1/2 ton Chevrolet and GMC C10 and C15 trucks from 1973 to 1988, and the kit mounts to DSE forged aluminum modular spindles that come separately.
Each rotor arrives pre-assembled with NAS high grade stainless hardware, and mounting brackets plus stainless braided hoses are part of the package. The 13 inch Pro Plus is designed to fit most 17 inch or larger wheels. Wheel styles differ widely, so use the Q072H template to confirm clearance against the wheel you intend to use.
Key features
- Monster Green caliper color on a 6-piston 6P fixed caliper
- Two-piece caliper with staggered pistons to even out pad wear
- Stainless steel pistons, abutments and noise suppression clips
- CNC machined from U.S. sourced forged or billet aluminum with a powder coated finish
- Dual seals guard against dust, weather and pressure
- Slotted, drilled and zinc plated two-piece rotor with a billet aluminum hat
Choosing wheels and clearance
Wheel clearance with a large rotor depends on more than diameter. Backspacing, offset, center bore and the inside of the wheel face all matter, and a wheel that looks correct on paper can still rub the caliper body. Test fit with the wheel mounted loosely and rotate it by hand before tires go on, looking for contact at the caliper and the rotor hat.
Lug nut seats and hub-centric fit also affect how the wheel sits. Clean the hub face and check that the studs are not damaged. Retorque after the first drives, since a wheel that settles can change its clearance. Pair the new brakes with tires whose size keeps the load rating and rolling diameter within the truck’s normal range.
- Test fit before mounting tires
- Check for rub marks after short drives
- Use the Q072H template for clearance checks
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301586MG |
| UPC | 90127912522 |
| Sold as | Kit |
| Rotor outside diameter | 13.0 inch |
| Rotor type | 2-piece, vented |
| Rotor thickness | 1.1 |
| Caliper | 6-piston 6P, fixed type, Monster Green |
| Pad type (FMSI) | D0731 |
| Brake hose | Steel braided, DOT approved |
| Minimum wheel diameter | 17.0 inch |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Drive | 2WD |
| Axle | Front |
| Spindle type | DSE forged aluminum modular 2.5 inch drop spindles |
| Spindles included | No |
| Template | Q072H |
| Grade type | Performance |
| Country of origin | USA |
Vehicle fitment
Trucks covered are the GMC C15 and C15 Suburban from 1975–1978, the GMC C15/C1500 and its Suburban from 1973–1974, the GMC C1500 and its Suburban from 1979–1986, the GMC R1500 and R1500 Suburban for 1987–1988, the Chevrolet C10 and C10 Suburban from 1973–1986, and the Chevrolet R10 and R10 Suburban for 1987–1988.
Non-Suburban 1988 Chevrolet R10 and GMC R1500 models, along with later model years, fall outside this coverage. Make sure your truck’s year, model and trim match before ordering.
Installation notes
Spindles are not included, so the modular spindles need to be in hand before the install begins. Use the Q072H template to test wheel clearance first. After installation, test braking at low speed, since any brake change alters stopping distance.
What’s included
The package holds the two-piece 6-piston 6P caliper in Monster Green, the mounting brackets, and stainless braided hoses with hardware. Rotors arrive pre-assembled with NAS high grade stainless hardware, and the pad type is D0731.
Not included: The DSE modular spindles and any wheels sit outside this package.
