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Product details
GT slotted discs, red FNSL6R calipers and BP-20 pads form this 14-inch R34 front brake system. The brackets and two-piece rotor assemblies fit the specified 1999–2002 hubs, and the included hoses must clear the steering and suspension at every position. Founded by Bill Wood in 1977 and based in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Its components include calipers, brake rotors, master cylinders, valves, fittings and brake lines, selected to suit the complete brake system.
Technical Details
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: Red 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
Kit contents and separate parts
- Manufacturer part number: 140-18258-R
- 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
Designed around the 1999–2002 Skyline R34 factory front hub and disc spindle, this FNSL6R package uses 14-inch rotors. Match the existing hub register and wheel-stud clearance to the hats before the brackets are shimmed into position. Stainless braided flexlines are part of the kit, with routing checked across the complete steering and suspension travel. Follow the dust-shield trimming instructions and confirm the larger rotor/caliper envelope against the wheel template. Modified studs or hubs require their own dimensional checks and may need machining. 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.
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 brings more than 20 years of brake and restoration experience to parts selection. Contact us with the installed spindle or axle details if you need help matching this kit.
