Overview
The Baer Brakes 4301587MG is a Pro Plus front disc brake kit in Monster Green for 1973–1987 Chevrolet and GMC C10 half-ton trucks with 2WD drive. It pairs a 6-piston caliper with a 14 inch two-piece slotted, drilled and zinc-plated rotor and is designed to mount on 2.5 inch drop modular spindles, which are sold separately.
Baer designed the 14 inch Pro Plus rotor to suit most wheels 18 inch or larger, and the system uses the popular D0731 pad type. Wheel styles vary widely, so fit cannot be guaranteed for every design. Use the Q072P template to compare clearance against your chosen wheel before mounting the kit.
Key features
- Two-piece 6-piston fixed caliper with staggered pistons to help reduce uneven pad wear.
- Caliper body CNC machined from US-sourced forged or billet aluminum with a powder-coated finish.
- Stainless steel pistons, abutments and noise suppression clips.
- Dual seals providing dust, weather and pressure protection.
- Two-piece slotted, drilled, zinc-plated vented rotor with a billet aluminum hat.
- Rotors arrive pre-assembled with NAS high grade stainless hardware.
- Steel braided brake hoses, DOT approved, supplied with the kit.
Caring for a big-rotor front brake
Large front rotors store and shed heat differently from smaller stock discs, so fluid condition and pad choice matter more on a half-ton truck that is driven hard or used for towing. Slotted and drilled rotors help gas and dust leave the pad face, but mismatched pads can wear unevenly and reduce that benefit. Stay with the pad type the system is built around, and bed new pads in gradually.
At each service, check the braided hoses and fittings for seepage, chafing or stiffness, and look at caliper boots for fluid. Replace brake fluid on a regular schedule and after any overheating event. When a steering-axle brake is serviced, also inspect wheel bearings and tie rod ends, since they carry the same loads and are easy to overlook once the wheels are off.
- Look for scoring or a lip at the outer rotor edge
- Replace hoses that show cracking or bulging
- Check pad wear evenly on both sides
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301587MG |
| UPC | 90127912393 |
| Caliper | 6-piston, 6P, fixed |
| Caliper color | Monster Green |
| Rotor outside diameter | 14.0 inch |
| Rotor thickness | 1.15 |
| Rotor type | 2-piece, vented, slotted, drilled, zinc plated |
| Minimum wheel diameter | 18.0 inch |
| Brake pad FMSI number | D0731 |
| Template | Q072P |
| Hose material | Steel braided, DOT approved |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Drive | 2WD |
| Axle | Front |
| Spindle type | Dse Forged Alum Modular 2.5 Inch Drop Spindles (not included) |
| Grade | Performance |
| Emission code | 6 |
| Country of origin | USA |
| Sold as | Kit |
Vehicle fitment
The manufacturer fitment list for this kit covers 1973–1986 Chevrolet C10 and C10 Suburban, 1987 Chevrolet R10 and 1987–1988 R10 Suburban, 1975–1978 GMC C15 and C15 Suburban, 1973–1974 GMC C15/C1500 and Suburban, 1979–1986 GMC C1500 and Suburban, and 1987 GMC R1500 and 1987–1988 R1500 Suburban.
Trucks outside those years and models, four-wheel-drive versions, and other GM trucks are not covered by this list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Spindles are not in the box, so have the 2.5 inch drop modular spindles on hand before you start. Check wheel clearance against the Q072P template first. Rotors arrive pre-assembled with stainless hardware, and the braided hoses and brackets are supplied, so the install starts from a complete set. Because this is steering-axle brake hardware, have the work checked by a qualified technician and test the brakes at low speed before normal driving.
What’s included
The kit includes the 2-piece 6-piston Monster Green caliper, the 14 inch slotted, drilled and zinc-plated rotors with billet aluminum hats, NAS high grade stainless rotor hardware, all mounting brackets, and stainless braided hoses with hardware.
Not included: the 2.5 inch drop modular spindles, sold separately.
