Wilwood 120-16088 Aero4 Radial Mount Disc Brake Caliper Black Anodized Left

The Wilwood Aero4 (120-16088) is a forged four-piston radial mount disc brake caliper finished in black anodize, designed for left-hand fitment. Built to deliver serious stopping performance on both road and track, this caliper brings proven race technology into a highly adaptable package suitable for a wide range of performance braking applications.

As the latest evolution in Wilwood's W4A/W6A caliper lineage, the Aero4 has been completely redesigned with internal fluid ports that eliminate the external fluid cross-over tubes and bulky center bridge assembly found on earlier designs. This results in a cleaner, more rigid structure with improved fluid routing efficiency.

Key Features:

• Stress-flow forged aluminum alloy body — the forging process realigns the metal's internal grain structure to follow the contour of the caliper, eliminating stress points caused by traditional billet machining
• Superior clamping efficiency with ultimate resistance to fatigue, distortion, and stress under heavy braking loads
• Radial mount design with multiple piston volume options for flexible system tuning
• Compatible rotor diameters from 12.88" to 15.00" to suit a broad range of braking setups
• Internal fluid cross-over ports replace external tubes for a cleaner, more streamlined assembly
• Black anodized finish for corrosion resistance and a clean appearance
• Left-hand fitment (sold individually)
• Brake pad plate: #6617

The Wilwood Aero4 is engineered for demanding performance environments where consistent, fade-resistant braking power is critical. Whether building a high-performance street machine or a dedicated track car, the 120-16088 delivers the reliability and braking force that serious applications demand.