Wilwood Front GT Slotted 14.00-inch Rotor / FNSL6R Package for GM A/F/X-Body and Ridetech Pin Spindles (1960–1982 Applications) - Polished

This front hub package combines polished six-piston calipers with 72-curved-vane GT rotors. Its 14-inch rings and aluminum hats mount on new hubs suited to the specified GM or Ridetech pin-spindle hardware. From its base in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Founded in 1977 by Bill Wood, its range covers calipers, brake rotors, master cylinders, valves, fittings and brake lines. Each component must be chosen for its role within the complete braking system.

This version pairs polished calipers with GT slotted rotors, so you get the bright finish with a slotted-only rotor face that suits track use. Without drilled holes, the rotors stand up better to repeated hard stops at track temperatures. Keep the calipers clean with a pH-neutral wheel cleaner, since acidic cleaners can dull a polished finish. The drilled-rotor version is 140-9804-DP.

Technical Details

Calipers and friction components

• Calipers: Forged Narrow Superlite 6R; 6 pistons per caliper
• Caliper finish: Polished
• Body construction: Forged aluminum
• Piston material: stainless
• Caliper mounting: radial
• Hydraulic inlet: 1/8-27 NPT
• Included pad compound: BP-10
• Listed piston bore sizes: 1.62 / 1.12 / 1.12 in

Kit contents and separate parts

• Manufacturer part number: 140-9804-P
• Supply: one kit with brake components for both sides of the front axle
• Mounting hardware: included
• Hubs: included with bearings and seals
• Spindles, master cylinder and brake booster: not included
• Hydraulic hoses: not included
• Includes hubs, wheel bearings and seals; 1/2-20 studs fit the selected 5 x 4.50 or 5 x 4.75-inch pattern.

Rotors and mounting dimensions

• Rotors: 14.00 in; 355.6 mm diameter x 1.10 in; 27.94 mm thick; vented Spec-37 Iron
• Friction faces: GT Slotted
• Rotor finish: Black Electro Coat
• Internal vanes: 72 curved
• Hats: aluminum; Black E-Coat; 1.750-inch hat offset
• Supplied hub wheel-stud patterns: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm
• Wheel studs: 1/2-20 thread; supplied with the hubs

Fitment & Compatibility

Match the exact spindle entry in the table below before choosing this 14-inch hub kit. Original GM A/F/X-body disc/drum installations and the listed Ridetech pin-spindle conversions have different selection requirements; the Ford, Mercury and Corvette entries require their specified modified hardware. Some early GM spindles need machining as illustrated in DS-565. Compared with the OE mounting face, the supplied hubs add 0.38 inch per side on drum-brake applications and 0.09 inch on disc-brake applications. Verify tire/fender clearance and choose the proper separate hydraulic lines. Nominal minimum wheel diameter: 18 in; 457.2 mm. Compare the actual wheel barrel and spokes with the linked clearance drawing; diameter alone does not establish fit.

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.

Our team at PMB Performance draws on 20+ years of brake and restoration work. We can help check the mounting requirements and component choices for your build.

Vehicle Applications

Application Notes

1. 14" Rotor
2. Universal Flexline kits available: 220-7056 (14"), 220-7699 (16") or 220-8307 (18"). Choose correct length for your application.
3. This is a front service-brake kit. Select any rear parking-brake cable separately for the vehicle's actual rear brake system.
4. Line kit included (manufacturer): None
5. Front line-kit reference: 220-7056