12.88-inch GT Slotted Front Brake Conversion for Nissan 240SX (1989–1998), Skyline (1989–1994) and 300ZX (1990–1996) — Wilwood Red FNSL6R

For the specified Nissan factory hubs, this kit supplies red FNSL6R calipers, GT slotted discs and BP-20 pads. The 12.88-inch rotor diameter offers the smaller wheel envelope of this Superlite family, but each wheel still needs a template check for spoke and barrel clearance. Wilwood Engineering designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines. Bill Wood founded the company in 1977; it is based in Camarillo, California, and serves motorsport, street-performance and specialized applications.

Fitment & Compatibility

Retains the factory front hubs on the specified 1989–1998 Nissan 240SX, 1989–1994 Skyline and 1990–1996 300ZX applications. The hat accepts four- and five-lug 4.50-inch stud patterns; this clearance arrangement does not convert the hub to another wheel pattern. Select the registration adapters and mounting bolts for the particular Nissan upright, following the instructions for the 240SX and Skyline. Trim the dust shield as directed. This 12.88-inch package requires separately purchased vehicle-specific flexlines. The table identifies the ABS and trim restrictions that must also be satisfied. Nominal minimum wheel diameter: 17 in; 431.8 mm. The linked wheel-clearance diagram must confirm barrel and spoke clearance; wheel diameter alone does not guarantee fit.

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-20
• Listed piston bore sizes: 1.62 / 1.12 / 1.12 in

Rotors and mounting dimensions

• Rotors: 12.88 in; 327.15 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: 48 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

Kit contents and separate parts

• Manufacturer part number: 140-18243-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: not included
• Related installation parts to select for the application: 220-18241; 220-12862

Installation documents

• Installation instructions

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.

With over 20 years of experience in brake systems and restoration, PMB Performance can help check the mounting arrangement, wheel clearance and remaining installation parts for your build.

Vehicle Applications

Application Notes

1. Line kit included (manufacturer): None
2. Front line-kit reference: 220-18241, 220-12862