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 Wilwood's 220-14073 rear brake line kit is included.
| 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 | Included (Wilwood 220-14073 rear line kit) |
| 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 | 140-14068-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 |
|---|---|---|---|
| 2012-2014 | Chrysler | 300 | Base |
| 2012-2015 | Chrysler | 300 | C |
| 2013-2014 | Chrysler | 300 | C Luxury |
| 2015 | Chrysler | 300 | C Platinum |
| 2012,2015 | Chrysler | 300 | Limited |
| 2012-2015 | Chrysler | 300 | S |
| 2012-2014 | Chrysler | 300 | SRT8 |
| 2013 | Chrysler | 300 | SRT8 Core |
| 2012-2015 | Dodge | Challenger | R/T |
| 2012 | Dodge | Challenger | R/T Classic |
| 2014 | Dodge | Challenger | Rallye Redline |
| 2012 | Dodge | Challenger | SRT8 |
| 2012-2015 | Dodge | Challenger | SXT |
| 2012 | Dodge | Challenger | SXT Plus |
| 2012-2015 | Dodge | Charger | Pursuit |
| 2012-2015 | Dodge | Charger | R/T |
| 2012-2015 | Dodge | Charger | SE |
| 2012-2013 | Dodge | Charger | SRT8 |
| 2012-2015 | Dodge | Charger | SXT |
| 2012 | Dodge | Charger | SXT Plus |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
