If you're looking to upgrade your '67-'73 Mustang's braking system, the Baer SS4 rear brake setup is a solid choice. This isn't just any kit; it comes with the S4 4-piston caliper, which is mounted to a robust 12-inch one-piece rotor that's been slot and drilled for better performance. Seriously, the first time I hit the brakes with this setup, I could feel the difference right away. The rotors are zinc plated, so they resist corrosion and keep looking good even after some hard driving.

What really sets this system apart is the billet backing plate. Not only does it hold the caliper in place, but it also houses the Banksia one-piece park brake assembly. This is a game-changer compared to the old drum-in-hat systems. The Banksia design is modern and works way better, using the same shoes as the later model Corvette C5/C6. So, you know it’s reliable.

Another thing I love about this kit is the stainless steel brake hoses and the D.O.T. compliant dust and weather seals on the calipers. They keep everything clean and functioning well, no matter the conditions. Just a heads up, this system is designed for Mustangs with a Shelby logo and either the 9-inch Ford rear small bearing housing or the 8-inch Ford rear with a standard bearing housing. It features a 5 x 4.500-inch wheel bolt pattern, so check your wheels before diving in.

Why should you consider the SS4?

• The 12-inch directionally vaned rotor is not just for looks; it improves cooling and performance.
• If you're pairing this with the Track4 front brake system, you’re in for a treat—it’s a perfect match.
• The fully machined billet backing plate is a nice touch, giving you that added durability.
• Complete with all necessary hoses, fittings, park brake cables, and hardware, you won’t be scrambling for parts.
• These 12-inch rotors fit most 15-inch wheels, but definitely verify with a template to be sure.

Let’s talk about the S4 caliper:

• It’s built with 4 strong 10mm cross bolts for maximum stiffness—no flexing here.
• Stainless steel abutments and noise suppression springs keep everything quiet.
• Hard anodized aluminum pistons mean better heat resistance and longevity.
• The internal crossover design is clever, ensuring fluid moves smoothly.
• With dual seals for dust, weather, and pressure, these calipers meet all D.O.T. specs.
• Each caliper features a machined logo that’s hand-painted—details matter!
• Using a common 4-piston pad (P/N DR1) makes replacements a breeze.
• It comes in a standard red powder coat finish, but you can choose black, silver, or even custom colors if you want to personalize it.
• And yes, you can get these for both front and rear to match your ride.
• The rear systems incorporate that nifty drum-in-hat park brake, and if you have c-clip style axles, Baer’s Verislide self-centering brackets are included.
• Finally, they use the correct banjo-style fittings—no pipe threads here, just solid engineering.
• And the best part? Everything is 100% made in the USA with materials sourced right here.

So, if you’ve got a 1967-1973 Ford Mustang and want to enhance your braking performance, the Baer SS4 brake system with park brake is a no-brainer. It’s practical, reliable, and built for enthusiasts who appreciate quality.