If you're looking to step up your braking game, check out this rear brake system featuring the S4 4-piston caliper. It's got a solid 12-inch one-piece rotor that's been slotted and drilled, plus it's zinc plated for that extra layer of protection against rust. One of the coolest things about this setup is the billet backing plate. Not only does it mount the caliper, but it also houses a modern park brake assembly that works way better than those old drum-in-hat systems you see everywhere. And yes, park brake cables are included, so you won’t be scrambling for parts.

Fitment:

• This system is designed specifically for 1964-1972 GM A-Bodies that have the Buick/Olds/Pontiac 10 Bolt and 12 Bolt Non C-Clip rear ends with bearing-on-axle ends.

Why go for the SS4?

• You get a 12-inch rotor that's directionally vaned, which helps with cooling and performance.
• It pairs perfectly with our Track4 front brake system if you're looking to create a balanced setup.
• The fully machined billet backing plate is a nice touch, and it holds the Banksia park brake assembly securely.
• Speaking of the park brake, it’s a modern take on the old drum-in-hat style and uses the same shoes as the late model Corvette C5/C6—pretty neat, right?
• Everything you need is included: hoses, fittings, and all the hardware.
• Those 12-inch rotors will fit some 15-inch wheels and most 16-inch ones, but definitely check with a template to be sure.

What’s cool about the S4 Caliper?

• It’s got 4 sturdy 10mm cross bolts for maximum stiffness—no flex here!
• Stainless steel abutments and noise suppression springs keep things quiet and smooth.
• The pistons are hard anodized aluminum, which means they’re tough and lightweight.
• Its internal crossover design is a smart feature that enhances performance.
• Dual seals keep dust and weather out while meeting D.O.T. specs—safety first!
• Each caliper has a machined logo that’s hand-painted, adding a touch of craftsmanship.
• It uses a standard 4-piston pad (P/N DR1), so replacements are a breeze.
• Choose from a silver powder coat finish, with standard colors being red, black, or silver—custom colors are also available if you want something unique.
• Available for both front and rear, so you can keep that look consistent across your ride.
• The rear systems come with a drum-in-hat park brake, making it a complete package.
• If you're dealing with C-clip style axles, don’t worry, Baer’s got you covered with their Verislide self-centering brackets.
• And let’s not forget, it uses the correct banjo-style fittings—no pipe threads here!
• 100% MADE IN THE USA, using materials sourced right here at home.

Products Fitment:

• Buick Century 1973-1977
• Buick Skylark 1964-1972 & 1975-1977
• Buick Special 1964-1969
• Buick Sportwagon 1964-1972
• Oldsmobile 442 1964-1971
• Oldsmobile Cutlass 1964-1977
• Pontiac GTO 1964-1967 & 1970-1973
• Pontiac LeMans 1975-1977
• Pontiac Tempest 1964-1970

So if you're serious about your braking performance, this 4302409S Baer Brakes Brake System is definitely worth a look. It’s built to last and designed to perform, making it a solid upgrade for your classic ride.