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Description
SS4+ Brake System Rear 4302438BFits Rear Ends w GM Small Pattern 10 12 bolt Bearing on Axle (BOA) w Flush Mount Bearing Housing Ends, (5x4. 75", 5x5"BC) Features: 2 Piece, 4 Piston, S4 Caliper Manufactured in Phoenix, AZ CNC Machined from US Sourced Forged or Billet Aluminum Powder Coated Finish Hard Anodized Aluminum Pistons, Stainless Steel Abutments and Noise Suppression Clips Dual Seals, Dust Weather & Pressure 2 Piece Slot, Drilled, Zinc Plate Rotor w Billet Aluminum Hat
Fits Rear Ends w/GM Small Pattern 10/12 bolt Bearing on Axle (BOA) w/Flush Mount Bearing Housing Ends, (5x4.75", 5x5"BC)
Features:
- 2-Piece, 4-Piston, S4 Caliper Manufactured in Phoenix, AZ
- CNC Machined from US Sourced Forged or Billet Aluminum
- Powder Coated Finish
- Hard Anodized Aluminum Pistons, Stainless Steel Abutments and Noise Suppression Clips
- Dual Seals, Dust/Weather & Pressure
- 2-Piece Slot, Drilled, Zinc-Plate Rotor w/Billet Aluminum Hat
Specs:
| Axle | Rear |
|---|---|
| Axle Flange | GM Small Pattern 10/12 Bolt with Flush Mount Bearing |
| Brand | Baer Brakes |
| Caliper | S4 |
| Caliper Color | Black |
| Disc Brake Caliper (Rear) Piston Quantity | 4 |
| Disc Brake Caliper (Rear) Type | Fixed |
| Disc Brake Pad FMSI Number | DR1-C |
| Disc Brake Rotor (Rear) Construction | Vented |
| Disc Brake Rotor (Rear) Outside Diameter | 13.000IN |
| Emission Code | 6 |
| Export Description | Brake Components |
| Grade Type | Performance |
| Hose Material | Stainless Steel |
| Includes Park Brake | Yes |
| Includes Park Brake Cables | No |
| Lug Count | 5 Lug |
| Min Wheel Dia (verify using template) | 17IN |
| Product Line | 13 Inch SS4+ |
| Product Type | 13 Inch SS4+ Rear Brake Kit |
| Prop 65 (C, R or CR) | CR |
| Prop 65 - Long Label | WARNING: This product can expose you to chemicals including Toluene Diisocyanate, and Nickel which are known to the State of California to cause cancer. For more information, visit www.P65Warnings.ca.gov |
| Prop 65 - Short Label | WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov |
| Prop 65 Yes/No | Yes |
| Rotor Thickness | .810IN |
| Rotor Type | 2-Piece |
| Surface Type | Slotted, Drilled & Zinc Plated |
| System Notes | Fits GM Small Pattern 10/12 Bolt Bearing on Axle Housing Ends w/Flush Mount Bearing, 2.780" axle register |
| Template | S135H |
| Title | SS4+ Brake System Rear |
| Wheel Lug/Bolt Pattern | 5x4.75/5x5.00 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Easy install
Color: Single Slat Gloss Black, Size: 2023+G20
Fits well. Made of plastic but very easy install.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2026
★★★★★ 1
I should have read all the other reviews ...
Color: Single Slat Gloss Black, Size: 2010-2013 E92, Color: Single Slat Gloss Black, Size: 2010-2013 E92
I read all the bad reviews, but I gave it a shot anyways
Tabs wont clip in place and fitment is slightly off.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
★★★★★ 5
Worth it
Color: Single Slat Gloss Black, Size: 2006-2009 E92
For perfect and looks great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 5, 2026
★★★★★ 5
Very nice quality
Color: Single Slat Gloss Black, Size: 2019-2022 G20
I have a 2022 330i bmw and it fit perfectly! Looks just like photos online and delivered quick!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 27, 2025
★★★★★ 4
Good Item
Color: Single Slat Gloss Black, Size: 2002-2005 E46
Good cost to product ratio, but fitment is a little loose
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 9, 2026