If you're looking to upgrade your braking game, the SS4+ Deep Stage Drag Race System is where it's at. This setup is all about combining performance with practicality, especially if you’ve got a heavy, fast Ford Mustang from '71 to '73. The first thing you’ll notice is the S4 4-piston caliper, which is mounted to an 11-inch, two-piece slot and drill zinc-plated rotor. Trust me, these rotors are built to last and can handle some serious heat. Plus, they’re vented, so you won’t have to worry about brake fade when you’re pushing your limits.

What really sets this system apart is its design. It’s compact enough to fit 15-inch wheels, making it a perfect choice for street use while still being tough enough for drag racing. The calipers come equipped with D.O.T. compliant dust and weather seals, which means you can take this beast out in different conditions without worrying about debris messing things up. And the quality doesn’t stop there; you’ll find NAS high-grade stainless hardware in the pre-assembled rotor, ensuring everything stays tight and secure.

Now, let’s talk fitment. This system is specifically designed to work with 1971-1973 Ford Mustang disc spindles, so you know it’s going to fit right out of the box. The hubs include ARP 1/2 inch x 20 race studs, which are a nice touch for anyone looking to push their car to the max. And don’t forget about the 6061 T-6 billet aluminum hat that’s anodized black for that sleek look, bolted right to the rotor for added stability.

The SS4+ isn’t just about looks, though. You’re getting a set of 6061-T6 billet machined hubs that come pre-assembled with Timken or SKF quality bearings and races. Everything’s packed with Redline synthetic grease, so you can hit the road or the strip without a second thought. The stainless steel abutments and noise suppression springs in the calipers really help with performance, too. Plus, they’ve got hard anodized aluminum pistons and an internal crossover design that keeps everything running smoothly.

For those of you who like to keep things simple, the calipers use a common 4-piston pad for easy replacements (P/N DR1), so you won’t be scrambling to find parts when it’s time to swap them out. And let’s not forget the aesthetic—these calipers come in a clear powder coat finish, with standard colors like clear and fire red, plus custom options available if you want to match your ride just right.

In a nutshell, the SS4+ Deep Stage Drag Race System is a solid choice for anyone who wants serious stopping power without sacrificing street usability. It’s 100% made in the USA with US-sourced materials, so you know you’re getting quality. If you’re serious about your Mustang, this is the upgrade you’ve been waiting for.