If you're looking to upgrade your classic ride's braking system without going overboard on size, the SS4+ is a solid choice. This little powerhouse packs a punch with its 4-piston caliper and 11-inch two-piece rotors that are not just slotted and drilled but also zinc plated for added durability. You get all the stopping power you need without the bulk, making it a perfect fit for those 15-inch wheels.

Now, let’s talk fitment. This setup is designed specifically for the 1955-1957 Chevrolet Passenger models that are running Heidts 2-inch drop spindles (SP-102). So, if you're rolling in a Bel Air, One-Fifty, or Two-Ten from that era, this brake system is made for you.

One of the best parts? You get all the benefits of Baer’s larger systems, just in a more compact package. It’s ideal for enthusiasts who want to sport larger wheels but still keep that classic stock look when they want to. And everything you need is included in the box—hoses, fittings, you name it.

• The rotors come pre-assembled, so you can skip the hassle and get right to the fun part—driving.
• Made from 6061 T-6 billet aluminum, the hat is anodized black and securely bolted to the rotor. You can count on quality here.
• High-grade U281 fine thread stainless hardware with captured nuts means you won’t be fumbling around with cheap parts.
• And those hubs? They’re not just any hubs; they’re machined from 6061-T6 aluminum, packed with quality bearings and races, and pre-assembled to save you time.
• Plus, if you’re still rocking your rear drum system, this setup plays nice with that.

Now, let’s dive into the S4 caliper features. This isn't just a pretty face; it's built for performance:

• Four 10mm cross bolts keep everything nice and stiff.
• Stainless steel abutments and noise suppression springs help keep things quiet and smooth.
• Those hard anodized aluminum pistons? They’re tough and designed to last.
• With an internal crossover design and dual seals, you’re looking at a system that meets D.O.T. specs for dust, weather, and pressure.
• And let’s not forget the eye-catching red powder coat finish—standard colors include red, black, and silver, with custom options available.
• It uses common 4-piston pads (DR1 for easy replacements) and comes with the right banjo fittings—no pipe threads here.
• Best of all, there’s no track width change compared to disc brakes, so you can keep your ride's stance just the way you like it.
• And yes, it’s 100% made in the USA with materials sourced right here at home.

So, if you’re ready to step up your braking game without losing that classic vibe, the SS4+ is definitely worth a look.