Wilwood 120-17724-RD Aero4 Radial Mount Four-Piston Disc Brake Caliper Red

The Wilwood 120-17724-RD Aero4 is a radial mount, four-piston disc brake caliper finished in red powdercoat, engineered to deliver serious stopping power for both street and track applications. Built on proven race technology, the Aero4 combines widespread mounting adaptability with the structural integrity demanded by high-performance and heavyweight braking systems.

Compatible with rotor diameters ranging from 12.88" to 15.00" and offering multiple piston volume options, the Aero4 is designed to meet the demands of a broad range of performance braking setups. Radial mounting provides precise, repeatable caliper positioning for consistent pad-to-rotor contact.

Key Features:

• Stress-flow forged aluminum alloy body — the forging process realigns the metal's internal grain structure to follow the caliper's contour, eliminating the structural weaknesses introduced by straight-billet machining
• Superior fatigue and distortion resistance — the forging method produces a caliper with exceptional clamping efficiency and long-term strength under repeated thermal and mechanical stress
• Internal fluid cross-over ports — redesigned internals eliminate the need for external cross-over tubes and the bulky center bridge assembly found on earlier W4A/W6A designs
• Radial mount design — enables precise, adjustable positioning across a wide range of rotor diameters (12.88" – 15.00")
• Four-piston configuration — delivers even, balanced clamping force across the brake pad for consistent, fade-resistant braking
• Red powdercoat finish — durable corrosion-resistant finish with high-visibility appearance
• Part of Wilwood's Aero series — the latest evolution of the W4A/W6A caliper platform

The Wilwood Aero4 is the ideal choice for custom brake builds, performance street vehicles, road racing, and any application requiring a robust, high-efficiency four-piston caliper with proven race-derived technology.