Overview
The Baer Brakes SS4 Plus rear brake kit, part number 4302334R, is a red rear disc brake system for GM 10/12 bolt small car pattern axles with C-clip axle flanges. It pairs a four-piston S4 caliper with a 13-inch two-piece slotted and drilled rotor, and it is built for 5×4.75 and 5×5.00 bolt circles.
The backing plate serves as the caliper mount and houses a one-piece park brake shoe assembly, so one rear assembly handles service braking and parking. The 13-inch SS4 Plus is made for wheels 17 inches or larger, though fit is not guaranteed with every wheel style.
Key features
- Red S4 caliper with a two-piece design and four pistons
- Hard anodized aluminum pistons with stainless steel abutments and noise suppression clips
- Dual dust, weather and pressure seals on the caliper
- Two-piece slotted, drilled and zinc-plated rotor with a billet aluminum hat
- Powder coated finish, CNC machined from forged or billet aluminum
- Rotors pre-assembled with NAS high grade stainless hardware
- Steel braided, DOT approved brake hoses with stainless hardware
- Park brake shoe assembly housed in the backing plate
Things to check
Before installing any rear disc system, confirm that the housing ends are the C-clip type and that the flange is the small car pattern. Measure the bolt circle across the wheel studs and count the lugs. These checks prevent wasted parts and make the rest of the installation straightforward.
Red finish is a visual choice and does not alter the friction material or the rotor design. Rear brakes still need regular inspection for pad thickness, rotor lip and hose condition. Use a torque wrench on the caliper bracket and wheel fasteners, and recheck the lug nuts after the first short drive. Keep a note of the wheel offset used so future wheel swaps keep the same clearance.
- Confirm the flange is C-clip type
- Measure the bolt circle before ordering
- Check park brake cable routing
- Inspect hoses for cracks or swelling
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302334R |
| UPC | 844165028888 |
| Sold as | Kit |
| Caliper | S4, four-piston, floating |
| Caliper color | Red |
| Pad type | DR1-C (FMSI DR1-C) |
| Rotor type | Two-piece, vented |
| Rotor style | Slotted, drilled, zinc plated |
| Rotor material | Iron rotor with aluminum hat |
| Rotor outside diameter | 13.0 inch |
| Rotor thickness | 0.81 |
| Minimum wheel diameter | 17.0 inch |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 lug |
| Axle flange | GM 10/12 bolt C-clip, small car pattern |
| Hose material | Steel braided |
| DOT approved hose | Yes |
| Park brake | Yes |
| Template | S135H |
| Country of origin | US |
Vehicle fitment
Compare the S135H template with your wheel before ordering, because fit is not guaranteed with every wheel style. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The rear axle flange must be a C-clip type with the GM 10/12 bolt small car pattern, so measure your housing before starting. Rotors arrive pre-assembled with stainless hardware, and the park brake shoe sits inside the backing plate. Use the S135H template against your wheel to confirm clearance before installation.
What’s included
The kit includes the red S4 caliper, two-piece rear rotors with billet aluminum hats, the backing plate with its park brake shoe assembly, DR1-C pads, steel braided brake hoses and the stainless hardware used with the rotors and hoses.
Not included: park brake cables, lug nuts and front rotors need to be supplied separately.
