Wilwood Forged Narrow Superlite R6 Big Brake FNSL6R Front Hub Kit,12.88"1974-80 Pinto/Mustang II Disc Spindle only

The Wilwood Forged Narrow Superlite R6 Big Brake FNSL6R Front Hub Kit (part #140-9801) is designed for 1974–1980 Pinto and 1974–1978 Mustang II vehicles with five-lug disc spindles. This kit upgrades braking performance with billet forged six-piston Superlite 6R callipers for improved stopping power and pedal feel. The large, vented 12.88" rotors handle heat better during repeated or hard stops. BP-10 performance brake pads are included, and shims ensure proper calliper alignment. The hub features a dual-pattern bolt circle and all required installation hardware comes in the box. This kit is made to fit 17" and larger wheels and requires the use of high-temperature bearing grease and stainless braided brake lines for the best safety and function.

KEY SPECIFICATIONS

- Fits: 1974–1980 Pinto, 1974–1978 Mustang II (five-lug disc spindles)
- Rotor size: 12.88" diameter, 1.10" thick, vented
- Calipers: Superlite 6R, billet-forged, six-piston, specific for left and right
- Hub: Dual pattern (5 x 4.50 or 5 x 4.75), 1.88" offset
- Pads included: BP-10 compound
- Hardware: High-strength washers, bolts, shims (.035"), studs, bearings, and seals included
- Caliper inlet: 1/8-27 NPT pipe thread (braided steel lines and adapters required)
- Requires minimum 17" wheel

INSTALLATION DETAILS

This kit must be installed by someone experienced with disc brake systems. Confirm your vehicle spindle, wheel, and hub pattern are correct before starting. Remove all original front brake components and clean the spindles. Mount calliper brackets from the rear of the spindle, applying threadlocker to bolts and following proper torque specs. Bearings should be packed with high-temperature grease, and all hardware and shims should be used as provided for correct alignment. Brake hoses are not included and must be upgraded to steel-braided hoses and adapters. Brake bleeding and bedding-in procedures are required for safe use. Always double-check fit and wheel clearance before final assembly. If you are not confident with these steps, consult a professional.

FACTORY FIT NOTES

- Only for 1974–1980 Pinto and 1974–1978 Mustang II five-lug disc brake spindles
- Confirm dual bolt pattern and minimum 17" wheels
- Some spindles may need removal of unused “ears” for clearance—do not alter mounting holes
- OEM brake hoses will not work; braided flex lines and adapters are required
- Regular inspection and maintenance of all components is advised
- Professional installation is strongly suggested if you are unsure about fit or assembly