Overview
The Baer Brakes 4301621S is a front disc brake kit built around a 1-piece Monoblock 6-piston, 6S caliper and a 14 inch, 2-piece slotted, drilled, zinc-plated rotor. It is a front-axle upgrade for 1971–1987 Chevrolet and GMC K5 and K10 trucks, Blazers and Suburbans.
This silver-finished version adds stainless braided hoses to the mounting brackets and hardware. Baer makes the calipers in Phoenix, Arizona, and the kit uses the D1247 pad type with template N085P for wheel clearance checks.
Key features
- Monoblock caliper with six pistons and the 6S designation
- Staggered pistons help even out pad wear
- Stainless steel pistons, abutments and noise suppression clips
- Dual seals for dust, weather and pressure
- 2-piece slotted, drilled, zinc-plate rotor with billet aluminum hat
- Powder-coated silver caliper finish
- Stainless braided hoses, mounting brackets and hardware included
Before you buy
Moving to a front disc setup on an older GM truck means matching the caliper, rotor and hub to the spindle and steering parts already on the axle. Look over the knuckles, ball joints and wheel bearings before the install, since a loose joint can make a new brake system feel vague. Track width and wheel offset also change how much room the caliper has inside the wheel, so the template check matters as much as the nominal diameter.
Silver calipers show road grime and brake dust more readily than darker finishes, so plan a routine wipe down with a non-abrasive cleaner. Keep the braided hose routing clear of the tire, the tie rod and any exhaust heat.
- Inspect the bearings and seals while the hub is apart
- Re-torque lug nuts after the first highway drive
- Check hose clearance at full steering lock
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301621S |
| UPC | 90127854037 |
| Caliper | 1-piece Monoblock, 6-piston, 6S, fixed |
| Caliper color | Silver |
| Rotor diameter | 14.0 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 | N085P |
| Lug count | 5 lug |
| Wheel bolt pattern | 6×5.50 |
| Minimum wheel diameter | 18.0 inch |
| Grade | Performance |
| Sold as | Kit |
| Country of origin | USA |
Vehicle fitment
Manufacturer data ties this 14 inch kit to 1971–1986 Chevrolet K10 trucks, 1975–1986 K5 Blazers and K10 Suburbans, 1987 Chevrolet Blazers and V10s, 1987–1988 V10 Suburbans, 1975–1987 GMC Jimmy, 1971–1978 GMC K15 and K1500 trucks and Suburbans, 1979–1986 GMC K1500 Suburbans and 1987 GMC V1500 models.
Trucks from 1988 onward, including 1988–1998 C1500 models, fall outside this list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Baer cannot promise that every wheel style will clear this brake package, so dry-fit the N085P template against the wheels you plan to run. A front disc swap of this size is best handled by a shop comfortable with GM truck steering and hub assemblies.
What’s included
The kit includes the 6S caliper, 14 inch 2-piece rotors with pre-assembled stainless hardware, stainless braided hoses, and every mounting bracket and hardware piece for the front axle.
Not included: wheels; the rotor is for wheels 18 inch and larger.
