Wilwood Front ProSpindle Brakes with Red Superlite 6R Calipers and 12.88-Inch SRP Rotors

Red Narrow Superlite 6R calipers distinguish this drilled-and-slotted 12.88-inch ProSpindle kit. Its radial caliper brackets, aluminum hubs and rotor hats must be assembled as the supplied system, including the height-specific ProSpindle and steering-arm procedures. The manufacturer is Wilwood Engineering, established in 1977 by Bill Wood and based in Camarillo, California. Its design and manufacturing work covers disc brake systems and components—calipers, brake rotors, master cylinders, valves, fittings and brake lines—for street-performance, motorsport and specialized applications. Selection must account for how those components operate together.

Technical Details

• Manufacturer part number: 140-9919-DR
• Caliper mounting: radial; hydraulic inlet 1/8-27 NPT
• Included friction: BP10 pads
• Wheel-diameter guide: 17 inches; actual wheel must pass the manufacturer clearance template
• Supported spindles: Wilwood standard-height ProSpindle 830-10832 or two-inch-drop ProSpindle 830-9807; spindles sold separately
• Included hub patterns: 5 x 4.50 inches (5 x 114.3 mm) and 5 x 4.75 inches (5 x 120.65 mm); 1/2-20 wheel studs
• Published OE hub offset: +0.68 inch per side; account for outward wheel movement
• Included: hubs, bearings, seals, dust caps and brake mounting hardware; separate rotor hats included
• Not included: spindles, master cylinder, booster or brake flexlines
• Rotor ventilation: 48 curved vanes
• Position and package: front brake and hub kit; one kit services both sides
• Calipers: Forged Narrow Superlite 6R, 6 pistons, forged aluminum bodies with stainless-steel pistons
• Finish: Red Powder Coat
• Rotors: 12.88 x 1.10 inches, vented Spec-37 iron; SRP Drilled & Slotted faces

Fitment & Compatibility

Compare the intended wheel with the complete clearance diagram, allowing for the caliper’s radial and spoke envelope. Brake lines are separate; original rubber hoses do not adapt directly. Select the correct 1/8-27 NPT caliper connection and flexline length, and check for interference through suspension travel and full steering movement.

Check the ProSpindle number and height before ordering, then compare the complete brake template with the intended wheel. Caliper and steering-arm alignment follow separate instructions for the standard and dropped spindle versions. Compatible spindle part numbers are 830-10832 for standard height and 830-9807 for the two-inch drop. The published +0.68-inch hub offset is per side and must be included in the wheel/fender clearance assessment.

Wilwood kit specifications · Manufacturer installation instructions and wheel-clearance diagram.

PMB Performance brings 20+ years of experience to brake selection. The spindle or axle configuration, wheel dimensions and hydraulic layout give us the information needed to review an application.

WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.