Overview
The Baer Brakes 4301390R is a red Extreme Plus front brake system for 1960–1986 Chevrolet C10 and GMC C15 2WD half-ton trucks fitted with CPP 2.5 inch drop spindles. It pairs a 14 inch, two-piece slotted and drilled rotor with a one-piece monoblock six-piston caliper in a red finish, and it is built for the 5×5 inch bolt pattern used on these trucks.
Baer offers the Extreme Plus as a front-axle kit with the parts needed for the hub and rotor assembly. Mounting brackets, stainless braided hoses and hardware are included, and the billet aluminum hubs arrive with premium bearings already packed with Redline synthetic grease. The red caliper is the difference between this part and the black 4301390B version of the same system.
Key features
- One-piece monoblock six-piston 6S caliper, manufactured in Phoenix, Arizona
- Caliper body CNC machined from US-sourced 2618 aluminum forging, powder coated
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons designed to minimize uneven pad wear
- Dual seals for dust, weather and pressure
- Two-piece slotted, drilled, zinc-plated rotor with a billet aluminum hat, pre-assembled with NAS high grade stainless hardware
- Billet aluminum hubs with premium bearings and billet dust caps
- Uses the D1247 pad type
Rotor and pad inspection
Two-piece rotors with an aluminum hat are checked differently from one-piece iron rotors. At each wheel removal, look at the friction surface for deep grooves, heat cracks and a rotor edge that has worn into a lip. Measure thickness against the minimum stamped on the rotor or in the service manual, and replace the rotor if it is at or below that figure. Slotted and drilled faces help shed gas and water, but they can also wear pads faster depending on driving style.
Pads should be replaced as a set with the matching D1247 compound, and the caliper slide pins should be cleaned and lubricated whenever pads come off. Check the hub bearings for play while the wheel is off, since loose bearings change rotor runout and cause pedal pulsing. Brake fluid absorbs moisture over time, so flush it on a regular schedule rather than waiting for a fault.
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301390R |
| UPC | 844165040965 |
| Sold as | Kit |
| Caliper | 6S, one-piece monoblock, six-piston, fixed |
| Caliper color | Red |
| Rotor outside diameter | 14.0 inch |
| Rotor thickness | 1.25 inch |
| Rotor construction | Two-piece, iron rotor with aluminum hat |
| Rotor style | Slotted, drilled, zinc plated, vented |
| Brake pad FMSI number | D1247 |
| Hose material | Stainless steel |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 inch |
| Wheel stud size | 1/2-20 x 2.25 inch |
| Minimum wheel diameter | 18.0 inch |
| Template | N117P |
| Drive and axle | 2WD, front |
| Country of origin | US |
Vehicle fitment
It fits these applications: 1960–1986 Chevrolet C10; 1967–1986 Chevrolet C10 Suburban; 1960–1966 and 1987–1989 Chevrolet Suburban; 1966 GMC 1000; 1960–1965 GMC 1000 Series; 1975–1978 GMC C15; 1967–1974 GMC C15/C1500; and 1979–1986 GMC C1500.
Fitment is for 2WD trucks only, so four-wheel-drive models are not covered. Chevrolet and GMC trucks from 1987 onward are not on the list, apart from the 1987–1989 Chevrolet Suburban. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The 2.5 inch CPP drop spindles are not included, so the spindles must already be installed before the Extreme Plus hubs and calipers go on. Check the N117P template against the wheels you plan to run, since Baer cannot guarantee fit with every wheel style. Brake work is safety-critical, so have the finished installation checked by a qualified technician before driving.
What’s included
The kit includes the 14 inch two-piece rotors, the 6S six-piston calipers, billet aluminum hubs with bearings, mounting brackets, stainless braided hoses and hardware, with the rotors pre-assembled with stainless hardware.
Not included: 2.5 inch CPP drop spindles and lug nuts.
