Overview
The Baer Brakes 4301438FR is a front S4 disc brake kit in Fire Red for GM G-Body cars and GM S10 and S15 Blazer and pickup trucks. It pairs a 4-piston S4 caliper with an 11-inch, 2-piece slotted, drilled and zinc plated rotor, and the hubs and spindles arrive assembled on stock height spindles. The kit is made in Phoenix, Arizona.
This kit suits owners who want a fixed caliper front brake upgrade for wheels of 15 inches and up. It is the 11-inch SS4 Plus, a smaller package built on the same design approach as the larger Baer systems.
Key features
- 4-piston S4 fixed caliper with a powder coated finish
- 2-piece slotted, drilled and zinc plated 11-inch vented rotor, pre-assembled with NAS high grade stainless hardware
- Hard anodized aluminum pistons with stainless steel abutments and noise suppression clips
- Dual seals for dust, weather and pressure
- CNC machined billet aluminum hubs with premium bearings packed with Redline synthetic grease
- Billet dust caps and steel braided brake hoses, DOT approved.
Before you buy
A front disc brake upgrade changes how the wheel, hub and caliper work together, so check wheel clearance with the caliper and rotor installed before the vehicle is driven. Fixed calipers with multiple pistons press pads evenly against the rotor, which helps braking feel consistent during repeated stops. Rotor diameter and thickness also affect how much heat the system can absorb on long grades or trail descents.
Pads are a separate purchase on this kit, so match the friction material to how the vehicle is used. Street pads, trail pads and performance compounds trade off noise, dust and bite differently. Use fresh brake fluid suited to the system, and keep the braided lines routed away from suspension travel and exhaust heat.
- Inspect braided hoses for chafing after trail outings
- Bed in new pads gradually before hard stops
- Recheck caliper bolt torque after the first few drives
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4301438FR |
| UPC | 90127920305 |
| Caliper | S4, 4-piston, fixed |
| Caliper color | Fire Red |
| Rotor | 2-piece, vented, slotted, drilled and zinc plated |
| Rotor outside diameter | 11.0 inch |
| Rotor thickness | 1.02 inch |
| Pad type | DR1 (FMSI) |
| Brake hose | Steel braided, DOT approved |
| Axle | Front |
| Lug count | 5 lug |
| Bolt pattern | 5×4.75 inch |
| Wheel stud size | M12-1.50 x 51.5mm |
| Minimum wheel diameter | 15.0 inch |
| Template | S125A |
| Spindles | Stock height, included |
| Sold as | Kit |
| Country of origin | USA |
Vehicle fitment
Baer’s application list for this kit covers 1978-1988 Buick Regal, 1978-1987 Chevrolet El Camino, 1978-1983 Chevrolet Malibu, 1978-1988 Chevrolet Monte Carlo, 1982-2003 Chevrolet S10, 1983-1994 Chevrolet S10 Blazer, 1982-1990 GMC S15, 1983-1991 GMC S15 Jimmy, 1978-1981 and 1985-1988 Oldsmobile Cutlass, 1978-1988 Oldsmobile Cutlass Supreme and 1978-1988 Pontiac Grand Prix.
Years outside these ranges, such as 1995 and later S10 Blazers, are not covered. Baer cannot guarantee wheel fit across every wheel style. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Mounting brackets, stainless braided hoses and hardware are included, so brackets do not need to be sourced separately. Compare the S125A template with the wheel you plan to run before mounting, and have a qualified technician do the installation.
What’s included
The kit includes the S4 calipers, 11-inch 2-piece rotors pre-assembled with NAS stainless hardware, billet aluminum hubs with premium bearings packed with Redline synthetic grease, billet dust caps, stock height spindles, mounting brackets, stainless braided hoses and hardware.
Not included: Brake pads are not part of the kit contents, so select pads matching the DR1 or HB100 pad type separately.
