Fitment questions?
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Product details
Black six-piston Superlite front calipers and 12.88-inch GT rotors suit the documented aluminum ProSpindle system. Check hub fit and hydraulic lines. These brake components attach to the separately supplied aluminum ProSpindle and sealed hub assembly. Founded by Bill Wood in 1977, Wilwood Engineering is based in Camarillo, California. The company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines. Its motorsport, street-performance and specialized applications require individual components matched to the complete brake system.
Technical Details
- Manufacturer part number: 140-17985
- Brake assembly: front conversion kit; Sold as a kit.
- Calipers: Forged Narrow Superlite 6R; 6 pistons per caliper; Black Powder Coat
- Caliper mounting: Radial
- Included pad compound: BP-10
- Piston material: Stainless
- Hydraulic caliper inlet: 1/8-27 NPT
- Rotor dimensions and construction: 12.88 × 1.10 inches; Spec-37 Iron; GT Slotted
- Wheel-size reference: 17 in; the complete wheel-clearance drawing determines fit
- Required separate assembly: Wilwood aluminum ProSpindle sealed-hub kit 830-17728; brake kit does not include the spindle or hub
- Hat mounting pattern: 5 × 4.50 / 4.75 inches; verify the mating ProSpindle hub and wheel arrangement
- Hydraulic flexlines: Not included; supply suitable hoses and fittings separately
- Mounting hardware: Included; verify the installed fastener engagement
- Not included: spindles, wheel hubs, master cylinder or brake booster
Fitment & Compatibility
This Superlite front package requires the specific Wilwood aluminum 2.00-inch-drop ProSpindle and sealed hub 830-17728. Six-piston radial calipers align with 12.88 × 1.10-inch rotors and the 1.875-inch-offset hat. Compare the separate hub with the 5 × 4.50/4.75-inch hat drilling and inspect registration before assembly. DS-1615 identifies the brackets and caliper-height procedure for the 12.88-inch kit. Check the wheel drawing and steering geometry, and provide compatible brake hoses separately. The front-steer arm supplied with the separate ProSpindle kit does not establish correct rear-steer geometry; rear-steer arrangements require application-specific steering arms.
Wilwood installation and compatibility information · ProSpindle kit configurations
PMB Performance brings over 20 years of parts and fitment experience to component selection. Share the ProSpindle identification, hub configuration and actual wheel measurements so we can help check the configuration before ordering.
Manufacturer warning: 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.
