Overview
The Baer Brakes 4302343FR is an SS4 rear brake kit for 12.0 inch rotors, with a 4-piston S4 caliper in Fire Red. It is intended for GM small pattern 10/12 bolt rear axle flanges with flush mount bearings and a 5×4.75/5×5.00 wheel bolt pattern.
Pistons are hard anodized aluminum, while the abutments and noise suppression clips are stainless steel. Dual seals guard against dust, weather and pressure. The backing plate holds a 1-piece park brake shoe assembly, and stainless braided hoses are included with the kit.
Key features
- S4 caliper with four hard anodized aluminum pistons
- Stainless abutments and noise suppression clips
- Dual dust, weather and pressure seals
- 1-piece slotted, drilled, zinc plated vented rotor
- Powder coated Fire Red finish
- Manufactured in Phoenix, Az from US sourced forged or billet aluminum
- Steel braided hoses with DOT approval
Hoses and pad choice
Braided hoses flex less under pressure than rubber lines, so the pedal feels firmer when the system is working correctly. Hoses should be checked for abrasion where they pass near suspension parts, and replaced if the outer braid is frayed or the fittings weep. Route each hose with enough slack for suspension travel so it does not stretch or rub on the caliper mount.
Pads should be chosen with the kit in mind. The pad types for this kit are DR1 or HB100, and the FMSI number is DR1-C. Choose pads in pairs on each axle, and bed them in as the pad maker directs before heavy use. Park brake cables are not included, so they should be sourced and checked as part of the same service.
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302343FR |
| UPC | 90127952818 |
| Format | Kit |
| Axle | Rear |
| Axle flange | GM small pattern 10/12 bolt with flush mount bearing |
| Caliper | S4, 4 pistons, fixed |
| Caliper color | Fire Red |
| Rotor type | 1-piece |
| Rotor outside diameter | 12.0 inch |
| Rotor thickness | 1.02 |
| Rotor construction | Vented |
| Rotor surface | Slotted, drilled and zinc plated |
| Brake hose | Steel braided, DOT approved |
| Pad FMSI number | DR1-C |
| Pad types | DR1 or HB100 |
| Template | S113E |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 lug |
| Minimum wheel diameter | 16.0 inch |
| Park brake shoe | 1-piece, included |
| Park brake cables included | No |
| Grade | Performance |
| Emission code | 6 |
| Country of origin | USA |
Vehicle fitment
Fit is set by the rear axle flange, bolt pattern and wheel size: GM small pattern 10/12 bolt with flush mount bearing, 5×4.75/5×5.00 and wheels of at least 16 inches. Confirm fit for your vehicle’s year, model and trim before ordering.
Installation notes
Park brake cables are not included, so they must be sourced separately. Baer does not guarantee every wheel style will fit, so compare the S113E template with the wheel before mounting. Have a qualified mechanic perform the installation, given the braking and park brake components involved.
What’s included
The kit includes the S4 4-piston caliper, the 1-piece rotor, the backing plate and park brake shoe, and stainless braided hoses.
Not included: park brake cables.
