Overview
The Baer Brakes S4 front brake system, part number 4261654S, is a silver front disc brake kit built around an 11 inch vented rotor and a 4-piston S4TL caliper. It is intended for 1970 to 1974 Ford and Mercury models that use drum brake spindles at the front, including the Ford Mustang, Ford Maverick, Ford Torino, Mercury Cougar and Mercury Comet.
Baer designed the S4 as a smaller version of its larger brake systems, sized for wheels 15 inch and up. The billet aluminum hubs come assembled with bearings, and the mounting brackets, braided hoses and hardware are supplied with the kit.
Key features
- Silver 4-piston S4TL top-loaded caliper with a powder coated finish
- 11 inch vented one-piece rotor that is slotted, drilled and zinc plated
- Pistons are hard anodized aluminum, with stainless steel abutments and noise suppression clips
- Dual seals guard against dust, weather and pressure, and the top load design speeds pad changes
- Billet aluminum hubs with premium bearings packed in Redline synthetic grease, plus billet aluminum dust caps
- Stainless steel braided DOT approved hoses, mounting brackets and hardware are all included
- Manufactured in Phoenix, Arizona, with CNC machined components of US sourced forged or billet aluminum
Pads and rotor care
Front rotors on a classic muscle car take steady heat from street driving and occasional hard stops. Pads wear faster in stop-and-go traffic, and a rotor with deep grooves or a pulsing pedal usually needs attention. Inspect the friction surfaces at each tire rotation and measure thickness against the minimum stamped on the rotor before reusing it.
Replacing drum brakes with a disc setup changes how the rear brakes share the load, so check the rear shoes, drums and proportioning valve during the swap. Brake fluid absorbs moisture over time, so flushing it on a regular schedule keeps the calipers responding well. Choose a pad compound suited to your driving, since aggressive pads can wear rotors faster on a daily-driven car.
- Look for scoring or blue heat marks on the rotor face
- Check pad thickness at every wheel service
- Replace braided hoses that show cracking or bulging
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4261654S |
| UPC | 90127974735 |
| Sold as | Kit |
| Axle | Front |
| Caliper | S4TL, 4-piston, fixed, top loaded |
| Caliper color | Silver |
| Rotor diameter | 11.0 inch |
| Rotor type | 1-piece, vented, slotted, drilled, zinc plated |
| Rotor thickness | 1.02 |
| Minimum wheel diameter | 15.0 inch |
| Wheel bolt pattern | 5×4.50, 5 lug |
| Wheel stud size | 1/2-20 x 2.25 inch |
| Brake hose | Steel braided, DOT approved |
| Disc brake pad FMSI number | 6070012 |
| Template | ST125A |
| Grade type | Performance |
| Emission code | 6 |
| Spindle requirement | OE drum brake spindles |
| Country of origin | USA |
Vehicle fitment
The manufacturer fitment list covers the 1970 Ford Fairlane, 1970 Ford Falcon, 1970 to 1974 Ford Maverick, 1970 to 1973 Ford Mustang, 1970 to 1971 Ford Torino, 1971 to 1974 Mercury Comet, 1970 to 1973 Mercury Cougar, 1970 Mercury Cyclone and 1970 to 1971 Mercury Montego, all with drum brake spindles at the front.
Years and models outside the listed ranges, such as a 1969 Ford Mustang or a 1975 Ford Maverick, are not covered. The kit requires OE drum brake spindles at the front. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Each hub arrives with bearings assembled. Test-fit each wheel against the ST125A template first, since the minimum wheel diameter is 15.0 inch and clearance can vary with wheel style.
A qualified technician should install the brakes, check the braided hose connections, and test the pedal before the car is driven.
What’s included
The kit contains the silver S4TL caliper, the 11 inch slotted drilled rotor, billet aluminum hubs assembled with bearings, mounting brackets, stainless steel braided hoses and hardware.
Not included: Wheels and tires, which must meet the 15.0 inch minimum wheel diameter.
