Wilwood 120-17724-BK Forged Radial Mount Disc Brake Caliper - Aero4 4-Piston Black

The Wilwood Aero4 120-17724-BK is a forged four-piston radial mount disc brake caliper engineered to deliver serious stopping performance for both street and track applications. Built on proven race technology, the Aero4 combines superior strength with broad adaptability, making it a go-to choice for high-performance and heavy-duty braking systems.

Key Features:

• Four-piston design with radial mounting for precise, two-plane alignment over the rotor
• Rotor diameter compatibility ranging from 12.88" to 15.00", accommodating a wide range of heavy-weight braking setups
• Multiple piston volume options for tunable brake bias and pedal feel
• Internal fluid ports eliminate external fluid cross-over tubes and the center bridge assembly, reducing potential leak points and overall complexity
• Stress-flow forged premium aluminum alloy body — the forging process realigns the metal's internal grain structure to follow the contour of the caliper, eliminating the structural weaknesses introduced by straight-block billet machining
• Results in superior clamping efficiency and exceptional resistance to fatigue, stress, and distortion under extreme load
• Black powder coat finish for corrosion resistance and long-lasting appearance
• Compatible with Wilwood brake pad plate #6617

The Aero4 represents the latest evolution of Wilwood's W4A/W6A caliper series, purpose-built for racers and performance enthusiasts who demand reliability and precision under the most demanding braking conditions.