Overview
Baer’s SS4 Plus 4302333HO is a rear disc brake kit for GM small pattern 10/12 bolt bearing-on-axle housing ends, with a 5×4.75/5×5.00 wheel bolt pattern. The four-piston S4 caliper is finished in Hugger Orange and clamps a 13 inch two-piece slotted, drilled, zinc-plated rotor.
Baer’s backing plate serves as the caliper mount and holds a one-piece park brake shoe assembly. The fixed caliper and 13.0 Inch rotor are sized for wheels of 17.0 Inch or larger.
Key features
- Fixed four-piston S4 caliper manufactured in Phoenix, Az
- Two-piece rotor, slotted and drilled, with a billet aluminum hat
- Powder coated caliper finish
- Hard anodized pistons with stainless steel abutments and noise suppression clips
- Dual seals for dust, weather and pressure
- Rotors pre-assembled with NAS high grade stainless hardware
Before you buy
A rear disc conversion changes how the vehicle slows, so the caliper, rotor, pads and hoses should be considered as one system. Pads wear faster on steep descents and in mud, so check their thickness at regular intervals rather than waiting for noise. Rotors can develop grooves or heat checks over time, and a badly scored rotor should be replaced. Clean the friction surfaces after water crossings and keep grease away from them.
Compare the axle flange, housing end style and bolt pattern with your rear end before buying. Wheel clearance is a common surprise with larger rotors, so test-fit the wheel before the brakes are fully assembled. Brake hoses and fluid are often renewed at the same time as the rear calipers, because older hoses can soften and old fluid absorbs moisture.
- Test-fit the wheel before final torque
- Bleed the system after any hose or caliper change
- Replace pads in matched sets on the same axle
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302333HO |
| UPC | 90127952047 |
| Sold as | Kit |
| Caliper | S4 |
| Caliper color | Hugger Orange |
| Caliper type | Fixed |
| Piston quantity | 4 |
| Rotor outside diameter | 13.0 Inch |
| Rotor construction | Vented |
| Rotor type | 2-Piece |
| Surface type | Slotted, Drilled and Zinc Plated |
| Rotor thickness | 0.81 |
| Min wheel diameter | 17.0 Inch |
| Axle flange | GM Small Pattern 10/12 Bolt Bearing on Axle (Buick/Olds/Pontiac) |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 Lug |
| Pad FMSI number | DR1-C |
| Template | S135H |
| Includes park brake | Yes |
| Includes park brake cables | No |
| Grade type | Performance |
| Brake hoses DOT approved | Yes |
| Country of origin | USA |
Vehicle fitment
The kit is built for GM Small Pattern 10/12 Bolt Bearing on Axle rear flanges. Confirm fit for your vehicle’s year, model and trim before ordering.
Baer cannot guarantee fit with every wheel style, so use the S135H template against your chosen wheel. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Baer advises using the S135H template against your wheel before final assembly, because the company cannot confirm fit for every wheel. Park brake cables are not part of the package, so budget for them separately if your setup needs them. A qualified brake technician should install the kit.
What’s included
The kit includes the S4 fixed caliper, two-piece rotors, backing plate with park brake shoe assembly, NAS high grade stainless hardware and braided brake hoses.
Not included: park brake cables.
