If you're looking to amp up your braking game on your '79 to '92 Mustang, this Baer 13" SS4+ Rear Brake Kit is where it’s at. It comes with a solid 4-piston S4 caliper that’s mounted to a 13-inch, two-piece rotor that’s not just slotted but also drilled and zinc-plated. This isn’t just any caliper; it’s built in Phoenix, AZ, and designed to handle the heat while keeping things cool and collected.

Let’s talk about the details. The S4 caliper features D.O.T compliant dust and weather seals, so you won’t have to worry about debris messing up your ride. It's compatible with the DR1-C pad type, which is a popular choice among enthusiasts for its performance. Plus, the rotors come pre-assembled with NAS high-grade stainless hardware, so you know they’re built to last.

One of the standout features here is Baer’s unique backing plate. It doubles as a caliper mount and houses a modern one-piece park brake shoe assembly. That means you get reliability and functionality all in one package. And let’s not forget the stainless braided hoses included in the kit—durable and ready to handle whatever you throw at them.

Now, if you’re worried about fitment, this kit is designed to fit most 17-inch wheels and larger, so you’ve got some flexibility there. Just a heads up though, it’s specifically for Mustangs with the OE Ford 8.8" C-clip rear end and 5-lug axles. Make sure your setup matches that, and you’ll be golden.

Features:

• 2-Piece, 4-Piston S4 Caliper from Phoenix, AZ
• CNC Machined from US Sourced Forged or Billet Aluminum
• Durable Powder Coated Finish
• Hard Anodized Aluminum Pistons for better performance
• Dual Seals to keep dust and pressure at bay
• 2-Piece Slot, Drilled, Zinc-Plated Rotor with Billet Aluminum Hat

Specifications:

• Applications: Ford Mustang 79-92
• Axle: Rear
• Axle Standoff: 2.50 inches
• Brand: Baer Brakes
• Caliper: S4, Color: Comp Yellow
• Piston Quantity: 4
• Caliper Type: Floating
• Disc Brake Pad FMSI Number: DR1-C
• Rotor Construction: Vented
• Rotor Outside Diameter: 13.000 inches
• Fitment Notes: For OE Ford 8.8 C-clip Rear End (5 Lug)
• Includes Park Brake and Cables
• Minimum Wheel Diameter: 17 inches (verify with template)
• Rotor Thickness: .810 inches
• Surface Type: Slotted, Drilled & Zinc Plated
• Wheel Lug/Bolt Pattern: 5x4.50

So, if you’re ready to take your Mustang’s braking system to the next level, this Baer kit is a solid choice. It’s built for performance and reliability, and it looks good doing it. Just make sure to consider a master cylinder upgrade for optimal performance.