Overview
The Baer Brakes 4301622B is a front disc brake kit with a 1-piece Monoblock 6-piston, 6S caliper and a 15 inch, 2-piece slotted, drilled, zinc-plated rotor. The manufacturer lists it for 1971 to 1987 Chevrolet and GMC K5 and K10 trucks, Blazers and Suburbans, and it is sold as a kit for the front axle.
The caliper is powder coated in black and uses the popular D1247 pad type. Baer manufactures the system in Phoenix, Arizona, from CNC-machined U.S.-sourced 2618 aluminum forgings, and the kit references template N085U for wheel clearance checks.
Key features
- 1-piece Monoblock, 6-piston, 6S caliper with staggered pistons to reduce uneven pad wear
- Stainless steel pistons, abutments and noise suppression clips
- Dual seals guard against dust, weather and pressure
- 2-piece slotted, drilled, zinc-plated rotor with a billet aluminum hat
- Rotors come pre-assembled with NAS high grade stainless hardware
- Powder-coated caliper finish
- All mounting brackets and hardware included
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301622B |
| UPC | 90127854044 |
| Caliper | 1-piece Monoblock, 6-piston, 6S, fixed |
| Caliper color | Black |
| Rotor diameter | 15.0 inch |
| Rotor thickness | 1.25 |
| Rotor type | 2-piece, vented |
| Rotor surface | Slotted, drilled and zinc plated |
| Hat | Billet aluminum |
| Brake pad FMSI | D1247 |
| Template | N085U |
| Lug count | 6 lug |
| Wheel bolt pattern | 6×5.50 |
| Minimum wheel diameter | 19.0 inch |
| Grade | Performance |
| Sold as | Kit |
| Country of origin | USA |
Vehicle fitment
Based on the manufacturer’s fitment list, this kit covers 1971–1986 Chevrolet K10 and 1975–1986 K5 Blazer models, 1975–1986 K10 Suburbans, 1987 Chevrolet Blazer and V10, 1987–1988 V10 Suburbans, 1975–1987 GMC Jimmy, 1971–1978 GMC K15/K1500 trucks and Suburbans, 1979–1986 GMC K1500 Suburbans and the 1987 GMC V1500.
Trucks from 1988 onward, including 1988–1998 C1500 models, are not on this list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Check the N085U template against your wheels before mounting, because Baer cannot guarantee fit with every wheel style and the rotor is listed for wheels 19 inch or larger. Front disc brake swaps touch the hub and steering area, so a shop experienced with GM truck front ends is a sensible choice.
What’s included
The kit includes the 6S caliper, the 15 inch 2-piece rotors with pre-assembled stainless hardware, and all mounting brackets and hardware.
Not included: wheels, which the rotor is listed to clear at 19 inch and larger.
