Wilwood 160-3583 GT 48 Curved Vane Spec-37 Disc Brake Rotor LH 13.06" x 1.38"

The Wilwood 160-3583 is a GT 48 Curved Vane Spec-37 disc brake rotor engineered for left-hand (LH/driver side) fitment. Built from a proprietary iron alloy developed specifically for extreme-temperature braking environments, this rotor delivers exceptional resistance to distortion, warping, cracking, and wear under the most demanding race conditions.

The Spec-37 iron alloy formulation draws directly from technology developed for Wilwood's extreme-duty military-specification rotors, providing heavy-wall castings suitable for moderate-temperature racing through street use. Every Spec-37 rotor is precision machined to less than .001" run-out, flatness, and parallelism for consistent, reliable performance.

Key Features:

• Proprietary Spec-37 iron alloy — military-derived formulation for maximum thermal resistance and durability
• GT Series asymmetrical face slot pattern — promotes consistent pad sweep and reduces brake fade
• 48 curved vanes — maximize internal airflow for superior cooling capacity and extended rotor life
• Individual dynamic balancing — ensures smooth, vibration-free braking at any speed
• Precision machined to <.001" run-out, flatness, and parallelism — race-grade tolerances straight from the box
• Left-hand (LH/driver side) directional design — curved vane orientation optimized for correct rotational direction
• Rotor diameter: 13.06 inches
• Rotor thickness: 1.38 inches
• Bolt circle: 8 x 7.00 inches
• Material: Iron, natural finish

Designed for short track and road course competition, the Wilwood 160-3583 provides the highest cooling capacity and longest service life in extreme braking applications. Sold individually.