Overview
The SS4 Plus Dual Deep Stage rear brake kit, part number 4302483C, is a rear disc brake upgrade built around four 4-piston S4 calipers and 11 inch two-piece slotted, drilled, zinc-plated rotors. It is made for GM 10/12 bolt C-clip rear axles in the small car pattern. It is a drag race system for heavy, fast cars that might also see street use.
The kit is sized for wheels 15 inches and larger, with a 5×4.50/5×4.75 bolt pattern and five lugs. Rotors arrive pre-assembled with NAS high grade stainless hardware, and mounting hardware is included. The calipers are manufactured in Phoenix, AZ. The pad type is FMSI DR1, and HB100 is also used.
Key features
- Four S4 calipers, each with 4 pistons, and 1.375 inch pistons in total set
- Hard anodized aluminum pistons with stainless steel abutments and noise suppression clips
- Two-piece slotted, drilled, zinc-plated rotors with an 11.0 inch outside diameter
- Vented rotor construction for the rear disc brake system
- Billet aluminum hats drilled for 5/8 inch wheel studs
- Powder coated clear finish on the calipers
- Semi-metallic friction material in performance grade
Bed-in and first use
Bedding in brakes transfers an even layer of pad material onto the rotor surface. It makes braking consistent and reduces noise or vibration. Do the procedure on a safe, empty road with several moderate stops, letting the brakes cool between runs. Avoid holding the pedal on hot brakes, which can leave uneven deposits.
Heavy drag use and street driving put different demands on the same parts. A pad built for launches may squeal or feel different when cold, so plan for a mix of conditions. Check the rotor surface for heat marks or blue spots after the first sessions, and confirm the caliper bolts and hats stay tight.
- Bed in on a clear, quiet road
- Let rotors cool between bed-in stops
- Re-torque hardware after the first runs
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302483C |
| UPC | 844165051381 |
| Sold as | Kit |
| Caliper | S4, four calipers, fixed type |
| Caliper piston quantity | 4 per caliper |
| Piston diameter | 1.375 inch |
| Caliper color | Clear |
| Rotor type | 2-piece, slotted, drilled, zinc-plated |
| Rotor construction | Vented |
| Rotor outside diameter | 11.0 inch |
| Rotor thickness | 1.02 |
| Axle flange | GM 10/12 bolt C-clip, small car pattern |
| Lug count | 5 |
| Wheel bolt pattern | 5×4.50/5×4.75 inch |
| Minimum wheel diameter | 15.0 inch |
| Pad type | FMSI DR1 (HB100 also used) |
| Friction material | Semi-metallic |
| Grade | Performance |
| Country of origin | USA |
Vehicle fitment
This kit is made for GM 10/12 bolt C-clip rear axles in the small car pattern, with a 5×4.50/5×4.75 inch bolt pattern and wheels 15 inches or larger. Compare your year, model and trim with the fit before buying.
Wheel size alone does not determine fit, so check the axle flange and bolt pattern too.
Installation notes
The rotors arrive pre-assembled, and the included mounting hardware is the fastener set for this kit. Brake lines are not in the box, so hose routing and length need to be settled before the calipers are plumbed. Heavy-duty drag use combined with street driving calls for a professional brake setup and a proper bed-in procedure before first use. Brakes are safety-critical, so have a qualified technician check the installation.
What’s included
The kit includes four S4 calipers with 1.375 inch pistons, 11 inch two-piece slotted, drilled, zinc-plated rotors pre-assembled with NAS high grade stainless hardware, billet aluminum hats drilled for 5/8 inch wheel studs, and mounting hardware.
Not included: brake lines, and the kit has no park brake component.
