If you're looking to upgrade your braking game, this rear system is where it's at. We're talking about the S4 4-piston caliper paired with a solid 12-inch one-piece rotor that’s been slotted and drilled, all wrapped up in a durable zinc plating. What really sets this apart is the billet backing plate. It's not just a caliper mount; it cleverly houses the Banksia one-piece park shoe, which is a huge step up from those old-school drum-in-hat park brake setups. Trust me, this modern design works way better. Plus, you get park brake cables included—no need to hunt those down separately.

Now, if you’ve got a 1967-1969 GM F-Body with a Buick/Olds/Pontiac 10 Bolt or 12 Bolt non C-Clip rear, this system is made for you. It's a perfect fit, no guesswork involved.

Why should you consider the SS4?

• The 12-inch rotor is directionally vaned, which helps with heat dissipation and overall performance.
• If you’ve got our Track4 front brake system, this rear setup pairs perfectly for a balanced feel on the road or track.
• That fully machined billet backing plate? It’s not just for show. It’s built to last and integrates the Banksia park brake assembly seamlessly.
• The Banksia park brake is a game-changer. It uses the same shoe as the late-model Corvette C5/C6, so you know it’s reliable.
• Everything you need comes in the box—hoses, fittings, and all the hardware.
• These 12-inch rotors fit nicely in some 15-inch wheels and most 16-inch wheels, but I’d recommend double-checking with a template just to be sure.

Let’s dive into the S4 caliper specifics:

• Four 10mm cross bolts give it maximum stiffness—no flex here!
• Stainless steel abutments and noise suppression springs keep things quiet and smooth.
• Hard anodized aluminum pistons ensure durability and performance.
• Its internal crossover design enhances fluid flow for better braking response.
• Dual seals keep dust and weather out, meeting D.O.T. specs for peace of mind.
• Each caliper features a machined logo that’s hand-painted—just a little touch of craftsmanship.
• Uses a common 4-piston pad for easy replacements (P/N DR1). No special orders needed.
• Comes in a sleek silver powder coat finish, with standard colors like red, black, or silver—custom colors are also available if you want something unique.
• Available for both front and rear, so you can achieve that cohesive look across your ride.
• The rear systems feature a drum-in-hat park brake for added convenience.
• If you're dealing with c-clip style axles, Baer’s Verislide self-centering brackets are included to make installation a breeze.
• Correct banjo style fittings are used—no pipe thread nonsense here.
• And the best part? It’s 100% made in the USA with materials sourced right here at home.

So if you're ready to take your Pontiac Firebird from 'meh' to 'wow,' this 12-inch rear SS4 brake system is the upgrade you didn't know you needed. Get ready to feel the difference!