Wilwood's Forged Narrow Superlite 4R rear disc kit adds four-piston FNSL4R calipers, 12.88in two-piece rotors, and BP-10 compound pads to muscle car rear axles that require a parking brake. An internal shoe parking brake is built into the hat for strong static holding power and a clean installation. This kit runs red calipers with slotted rotors and balances rear braking to complement a front big brake upgrade.
| Type | Forged Narrow Superlite 4R 4-Piston Rear Parking Brake Kit |
| Position | Rear |
| Material | Forged aluminum calipers; two-piece rotors; BP-10 pads |
| Finish | Red calipers, slotted rotors |
| Size | 12.88in rotor diameter |
| Quantity | 1 (complete rear kit) |
| Part Number | 140-9221-R |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2005-2014 | Ford | Mustang | Base |
| 2012-2013 | Ford | Mustang | Boss 302 |
| 2008-2009 | Ford | Mustang | Bullitt |
| 2005-2014 | Ford | Mustang | GT |
| 2007-2008 | Ford | Mustang | Shelby GT |
| 2007-2014 | Ford | Mustang | Shelby GT500 |
| 2008-2009 | Ford | Mustang | Shelby GT500KR |
