Caliper FDL 1.75in Piston x .810 Rotor

The Caliper FDL 1.75in Piston x .810 Rotor by Wilwood is a fixed-mount disc brake caliper engineered for high-performance automotive applications where stopping power, precision control, and thermal stability matter. This caliper is purpose-built for drivers upgrading their braking systems—whether for track use, heavy-duty towing, or street performance builds—who demand repeatability and fade-free operation under demanding conditions. The FDL designation indicates Wilwood's fixed-disc architecture, meaning the caliper body remains stationary while the rotor spins, a proven design that simplifies pad replacement and reduces deflection compared to floating designs.

The 1.75-inch piston and .810-inch rotor thickness specification defines this caliper's hydraulic leverage and brake authority. The 1.75-inch piston size generates substantial clamp force, translating pedal pressure into firm, modulated braking without excessive input force—critical for street and track drivers who need confident, progressive feel. The .810-inch rotor thickness accommodates higher thermal loads and resists warping during extended braking cycles, whether hauling heavy loads or running multiple hot laps. Wilwood's FDL platform features ductile iron construction with integrated pad wear indicators, stainless steel hardware, and efficient cooling passages that dissipate heat rapidly, maintaining consistent friction coefficients across a wide temperature envelope.

This caliper suits mechanics and enthusiasts building or upgrading braking systems on street rods, sports cars, light trucks, and dedicated track vehicles where factory braking is insufficient or unreliable. Installation requires proper rotor sizing to match the .810-inch specification, compatible brake lines, and DOT-approved fluid—your brake system rebuild should include new pads matched to your driving environment and a full system bleed to eliminate air. Verify your vehicle's brake line routing and caliper mounting locations before ordering; Wilwood provides detailed fitment charts and technical support to ensure correct application and maximum safety margin.