Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
This R34 front kit uses red six-piston calipers over 14-inch SRP rotors, with BP-10 pads included. The large rotor diameter requires a wheel-envelope check, and the factory hub must match the supplied aluminum hat and register adapter before the assembly can sit flush. Wilwood Engineering, based in Camarillo, California, has designed and manufactured disc brake systems since its founding by Bill Wood in 1977. The range spans calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications.
Technical Details
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-10
- Listed piston bore sizes: 1.75 / 1.25 / 1.25 in
Kit contents and separate parts
- Manufacturer part number: 140-18258-DR
- 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
Installation documents
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: SRP Drilled & 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
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.
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.
Our team at PMB Performance draws on 20+ years of brake and restoration work. We can help you review the application requirements before you assemble the system.
