If you're serious about drag racing, you know that every bit of performance counts, especially when it comes to your brakes. This rear brake system is built for the hardcore enthusiast who lives for the track. We're talking about a setup with four S4 4-piston calipers and 11-inch x 1-inch rotors that are drilled, slotted, and zinc plated. These aren’t just any brakes; they’re designed to handle the heavy, fast cars that need reliable stopping power for launching and staging. Just a heads up—this system is tailored to fit specific housing ends, so if you're not sure what you have, shoot us a message or check out the images we provide to help identify your setup.

Important: You’ll need to turn down your axle flange to 5.75 inches for this to fit properly. We offer various piston sizes; the larger 1.75-inch pistons deliver maximum clamping force but may lead to longer pedal travel because of their volume requirements. If you’re looking for something that’s been a hit in the NMRA True Street classes, the 1.375-inch piston option is popular for limited street use. Just keep in mind—these systems are meant for racing. If you decide to take them on the street, make sure you adjust the brake bias accordingly.

Heads up: This system comes with high-friction pads optimized for drag racing, which means they’ll produce more dust and noise than your average street pads.

• Made for Ford 9 Inch with early big housing ends and a 2.5-inch standoff
• Rotors drilled for 5/8 studs with 11/16 holes for both 5 x 4.50 and 5 x 4.75 bolt patterns
• Requires axle flange to be 5.75 inches
• Rotor register needs to be 2.780 inches

Why go for the SS4+ Deep Stage Drag Race Systems?

• All the power of our larger brake systems but compact enough for 15-inch wheels
• Compatible with most dual beadlock wheels
• Engineered specifically for heavy, fast cars
• Street use is possible but requires careful adjustment
• Made from 6061 T-6 billet aluminum with a sleek black anodized finish
• High-grade U281 fine thread stainless hardware with captured nuts

Here’s what makes the S4 Caliper stand out:

• Four 10mm cross bolts for maximum stiffness
• Stainless steel abutments and noise suppression springs
• Hard anodized aluminum pistons for durability
• Internal crossover design for improved performance
• Dual seals that meet D.O.T. specifications to keep out dust and moisture
• Machined logo with a hand-painted finish
• Uses a common 4-piston pad for easy replacements (P/N DR1)
• Available in Fire Red powder coat finish, with custom colors offered
• Can be matched front and rear for a consistent look
• Utilizes correct banjo style fittings—no pipe threads here!
• 100% MADE IN THE USA with materials sourced right here!

In short, if you’re serious about your drag game and need a brake system that can keep up with your ambitions, this setup is worth considering.