Wilwood's AERO4 rear axle kit replaces the factory rear discs with forged four-piston W4AR calipers, twin 1.12 in stainless pistons giving 1.98 sq in of clamping area against 6617 plate BP-20 pads. The 14.25 in by 1.10 in Spec-37 iron rotors use 72 curved internal vanes and a slotted face that sweeps pad gases off the contact patch. An aluminum hat retains the OE parking brake, and piston area is matched to the stock master cylinder and ABS bias so brake balance stays factory correct. Calipers are red powder coat, minimum wheel diameter is 18 in, and the rear brake line kit (Wilwood 220-11772) is sold separately.
Specifications
| Type | AERO4 Big Brake Rear Brake Kit for OE parking brake |
| Position | Rear |
| Caliper | AERO4 (W4AR) four piston, twin 1.12 in stainless pistons, 1.98 sq in piston area, radial mount (120-13338-RD) |
| Rotor | 14.25 in x 1.10 in, GT 72 curved vane, slotted face |
| Rotor Material | Spec-37 iron, black electro coat (160-11312-GTB (left) / 160-11311-GTB (right)) |
| Brake Pads | 6617 plate, BP-20 compound, 11.1 sq in pad area |
| Rotor Hat | Aluminum parking brake hat, black e-coat (170-13904) |
| Finish | Red powder coat calipers |
| Brake Lines | Not included; Wilwood 220-11772 rear line kit required |
| Minimum Wheel Diameter | 18 in |
| Rear End | OEM rear end, 0.00 in axle offset, factory spindles |
| Quantity | 1 kit (covers both rear wheels) |
| Part Number | 140-11765-R |
Documents: Installation Instructions (PDF)
Manufacturer fitment exclusion (Wilwood): "Kits will not fit AWD, SRT-8, Police, or any car equipped with factory Brembo caliper." SRT8 models were built with factory Brembo calipers, and Wilwood's vehicle listing for this part number excludes SRT-8. Where the compatibility table below lists an SRT8 submodel, this manufacturer exclusion governs. Verify your car's factory caliper, drivetrain and package against Wilwood's listing for this part number before ordering.
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2005-2007,2011 | Chrysler | 300 | Base |
| 2005-2011 | Chrysler | 300 | C |
| 2005-2010 | Chrysler | 300 | C SRT8 |
| 2005-2011 | Chrysler | 300 | Limited |
| 2008-2009 | Chrysler | 300 | LX |
| 2010 | Chrysler | 300 | S |
| 2009 | Chrysler | 300 | Signature Series |
| 2005-2010 | Chrysler | 300 | Touring |
| 2009-2011 | Dodge | Challenger | R/T |
| 2009-2011 | Dodge | Challenger | SE |
| 2009-2011 | Dodge | Challenger | SRT8 |
| 2006-2007 | Dodge | Charger | Base |
| 2006 | Dodge | Charger | Daytona R/T |
| 2006-2011 | Dodge | Charger | R/T |
| 2006-2011 | Dodge | Charger | SE |
| 2006-2010 | Dodge | Charger | SRT8 |
| 2006-2010 | Dodge | Charger | SXT |
| 2005-2008 | Dodge | Magnum | R/T |
| 2005-2008 | Dodge | Magnum | SE |
| 2006-2008 | Dodge | Magnum | SRT8 |
| 2005-2008 | Dodge | Magnum | SXT |
| 2005 | Dodge | Magnum | SXT Special Edition |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
