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Product details
The black FNSL6R assembly for the R33 Skyline uses 14-inch GT slotted rotors and 4.86-square-inch effective caliper piston area. Its 72-vane, 1.25-inch-thick discs mount to the original hubs through aluminum hats, and braided flexlines are included. Bill Wood established Wilwood Engineering in 1977. From Camarillo, California, the company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized applications.
Technical Details
Kit contents and separate parts
- Manufacturer part number: 140-18253
- Supply: one brake kit; components for both sides of the axle
- Mounting hardware: included
- Hubs: not included
- Spindles, master cylinder and brake booster: not included
- Brake flexlines: included; DOT-compliant hoses
Fitment & Compatibility
The 14-inch FNSL6R package retains the front hubs of the specified 1995–1998 Skyline R33. Verify the hub register, stud clearance and wheel envelope before installing the two-piece rotor assemblies. The guide calls for dust-shield trimming and careful alignment of the radial caliper brackets. Included braided hoses connect the calipers to the vehicle; support them so they cannot rub the tires or become tight at full travel. This R33 configuration uses the piston sizes and mounting hardware listed above, so selection should follow the exact kit guide rather than rotor diameter alone. Nominal minimum wheel diameter: 18 in; 457.2 mm. The linked wheel-clearance diagram must confirm barrel and spoke clearance; wheel diameter alone does not guarantee fit.
Rotors and mounting dimensions
- Rotors: 14.00 in; 355.6 mm diameter x 1.25 in; 31.75 mm thick; vented Spec-37 Iron
- Friction faces: GT Slotted
- Rotor coating/finish: Black Electro Coat
- Internal vanes: 72 curved
- Hats: Aluminum; Black E-Coat; 0.595-inch hat offset
- Rotor/hat wheel-stud clearance patterns: 4 x 4.5 in; 4 x 114.3 mm; 5 x 4.5 in; 5 x 114.3 mm
Calipers and pads
- Calipers: FNSL6R; 6 pistons
- Caliper finish: Black Powder Coat
- Body construction: Forged aluminum
- Pistons: stainless
- Mounting: radial
- Hydraulic inlet: 1/8-27 NPT
- Included pad compound: BP-20
- Listed piston bore sizes: 1.75 / 1.25 / 1.25 in
Installation documents
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.
PMB Performance has supported brake and restoration projects for more than 20 years. Share your vehicle and installed chassis hardware with us for help selecting the correct brake package.
