Overview
The Baer Brakes 4301389MG is a Monster Green Pro Plus front brake kit for 60-87 Chevy/GMC 2WD 1/2 ton trucks, built for a 6 lug hub on a 6×5.5 inch bolt pattern. It mounts a 6P caliper on a 14 inch slotted, drilled rotor and is aimed at GM C10 trucks that run wheels 18 inch or larger.
The 6-piston, 6P caliper is two-piece and is machined from forged or billet aluminum, with a powder coated finish in Monster Green. Its stainless steel pistons and noise suppression clips work alongside staggered pistons and dual seals. The pads use the D0731 FMSI number, and the rotor thickness is 1.15.
Key features
- Two-piece 6P caliper with six pistons and stainless steel pistons and abutments
- Forged or billet aluminum caliper body with powder coat finish
- Staggered pistons and dual dust, weather and pressure seals
- Two-piece slotted, drilled and zinc-plated 14.0 Inch rotor with billet aluminum hat
- Stainless steel noise suppression clips
- Steel braided hoses with DOT approval, mounting brackets and hardware
- Billet hubs with premium bearings and billet dust caps
Hubs, bearings and seals
Hubs carry the wheel bearings that keep the rotor running true, so they deserve attention whenever the brakes are serviced. Billet hubs hold tight tolerances, but bearings still need clean grease and proper preload to last. Look for play at the wheel, heat after a drive or a grinding sound when turning as signs of trouble.
Dust and water are the usual enemies of seals and bearings on a truck used off pavement. Keep the hub area clean when the wheels come off, and check the seal lips for cuts before reinstalling. Dust caps help keep grit out, but they should be seated flat so they do not trap moisture behind them.
- Check wheel play with the truck lifted and supported
- Clean old grease from the spindle before repacking
- Replace seals that show cuts or hardening
- Torque wheel nuts to specification after the first drive
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301389MG |
| UPC | 90127877708 |
| Sold as | Kit |
| Caliper | 2-piece, 6-piston, 6P, fixed |
| Caliper color | Monster Green |
| Brake pad FMSI number | D0731 |
| Rotor outside diameter | 14.0 Inch |
| Rotor thickness | 1.15 |
| Rotor construction | Vented, 2-piece |
| Rotor surface | Slotted, drilled and zinc plated |
| Hub | Billet aluminum |
| Lug count | 6 Lug |
| Wheel bolt pattern | 6×5.50 |
| Wheel stud size | 1/2-20 x 2.25 Inch |
| Minimum wheel diameter | 18.0 Inch |
| Hose material | Steel braided |
| Brake hose DOT approved | Yes |
| Spindle type | Cpp nodular iron 2.5 Inch Drop |
| Spindles included | No |
| Template | Q117P |
| Axle | Front |
| Drive | 2WD |
| Applications | GM C10 Trucks 60-87 |
| Grade type | Performance |
| Emission code | 6 |
| Country of origin | USA |
Vehicle fitment
It fits the following Chevrolet and GMC models:
- Chevrolet C10, 1960-1986
- Chevrolet C10 Suburban, 1967-1986
- Chevrolet Suburban, 1960-1966 and 1987-1989
- GMC 1000, 1966
- GMC 1000 Series, 1960-1965
- GMC C15, 1975-1978
- GMC C15/C1500, 1967-1974
- GMC C1500, 1979-1986
Chevrolet and GMC C10 pickups from 1987 to 1989 are not shown on this list, and nothing from 1990 onward is named. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The kit does not include the w/Cpp 2.5 Inch Drop Modular Spindle (6 Lug, 6×5.5BC) named in the fitment notes. Use Template Q117P to check wheel clearance before fitting, because Baer cannot guarantee fit with every wheel style.
Bleed the brake hydraulics fully after the steel braided hoses are installed, and check the pedal before the truck goes on the road.
What’s included
The kit includes the 6P caliper, the 14.0 Inch two-piece rotors, billet aluminum hubs with bearings and dust caps, mounting brackets, steel braided hoses and hardware.
Not included: the 2.5 inch drop modular spindle.
