Wilwood 140-18368-D SX6R Front Big Brake Kit 15" SRP Rotor Mustang II Roadster Shop RSF-2

The Wilwood 140-18368-D is a front big brake kit featuring the top-of-the-line SX6R forged six-piston caliper, purpose-built for Roadster Shop SPEC and REVO RS chassis equipped with the RSF-2 forged 6000-series spindle. This fully bolt-on kit delivers race-bred stopping power with a premium street appearance, making it the ideal upgrade for high-performance Mustang II-style suspension builds.

At the heart of this kit is a massive 15.00-inch SRP drilled and slotted rotor featuring Wilwood's proprietary Spec37 iron alloy construction, engineered to withstand extreme temperatures while resisting distortion and cracking. Up to 72 curved cooling vanes maximize thermal capacity for improved performance and extended service life. The two-piece design pairs the vented iron rotor with a lightweight aluminum hat to reduce unsprung weight.

The SX6R forged aluminum caliper delivers exceptional clamping force through increased piston volume, translating to stronger braking with reduced pedal effort. Rigid center bridges and removable bridge bolts enhance caliper stiffness for consistent, fade-free performance under demanding conditions. Included BP-10 series street performance brake pads provide fast initial response, excellent fade resistance, and extended pad life for daily-driven and weekend performance applications.

Key Features:

• SX6R forged six-piston aluminum caliper — largest in Wilwood's RSF-2 lineup
• 15.00-inch SRP drilled and slotted two-piece rotor
• Spec37 proprietary iron alloy rotor construction for extreme heat resistance
• Up to 72 curved cooling vanes for maximum thermal management
• Lightweight two-piece aluminum hat reduces unsprung weight
• Rigid center bridge and removable bridge bolt caliper design
• BP-10 street performance brake pads included
• Designed for Roadster Shop SPEC and REVO RS chassis with RSF-2 forged spindle
• Fully bolt-on installation — no custom fabrication required
• Multiple caliper colors available; optional track-only upgrades available by custom order

The Wilwood 140-18368-D front brake kit is the definitive big brake solution for builders seeking maximum stopping performance from their Mustang II-based chassis build. Part number suffix -D denotes the drilled and slotted SRP rotor finish.