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Description
S4 Brake System Front 4261369FRFits Wilwood Mustang II Pro Spindles 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 Specs: Axle Front Brand Baer Brakes Caliper S4 Caliper Color Fire Red Disc Brake Caliper (Front) Piston Quantity
Fits Wilwood Mustang II Pro Spindles
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
Specs:
| Axle | Front |
|---|---|
| Brand | Baer Brakes |
| Caliper | S4 |
| Caliper Color | Fire Red |
| Disc Brake Caliper (Front) Piston Quantity | 4 |
| Disc Brake Caliper (Front) Type | Fixed |
| Disc Brake Pad FMSI Number | DR1 |
| Disc Brake Rotor (Front) Construction | Vented |
| Disc Brake Rotor (Front) Outside Diameter | 11.000IN |
| Emission Code | 6 |
| Export Description | Brake Components |
| Grade Type | Performance |
| Hose Material | Hoses Not Included |
| Lug Count | 5 Lug |
| Min Wheel Dia (verify using template) | 15IN |
| Product Line | 11 Inch SS4+ |
| Product Type | 11 Inch SS4+ Front 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 Yes/No | Yes |
| Rotor Thickness | 1.020IN |
| Rotor Type | 2-Piece |
| Spindle Type | Wilwood Mustang II Pro |
| Spindles Included | No |
| Surface Type | Slotted, Drilled & Zinc Plated |
| System Notes | Designed to be used with Wilwood Mustang II Pro Spindles (Stock & Drop Height) |
| Template | S125A |
| Title | S4 Brake System Front |
| Wheel Lug/Bolt Pattern | 5x4.50/5x4.75 |
| Wheel Stud Size | 1/2-20" x 2.25" |
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
4.2 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 4
Worth it! Love these filters.
I love K & N air filters and always install them in my cars. This eliminated my cars Turbo lag in my 2019 Honda Civic Ex which has a 1.5L Turbo. Acceleration has improved and makes the car louder (I also have dual exhaust) I love how you don't have to change or clean it for 50,000 miles!! I know it's expensive but will last forever! Only issue was it was very difficult to install and a pain but this is more Hondas fault as I could not fully remove the plastic case where this filter goes under the hood even with tools.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 23, 2019
★★★★★ 5
Works great
Perfect fit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 7, 2025
★★★★★ 5
More power and better mileage
Put this in my 2017 CRV and have noticed much more pickup and better mileage overall. Usually I average 22mpg with mixed driving and this has me hovering around 25mpg and I get to have extra power on top of that. Install was straightforward and a breeze. Whole project is done in ten mins and your car is instantly more fun and getting improved MPGS
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 30, 2024
★★★★★ 5
Great fit and price
Size: 5424WS, Style: Workshop
For a 2018 Jeep Grand Cherokee. Perfect for. Great price. I’m sure I’ll get 20-30K miles out of this filter.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 5
Fits
Size: 5424WS, Style: Workshop
Perfect fit for my 2019 Toyota Highlander. Quality filter.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026