Wilwood Rear Red AERO4/MC4 Conversion, 14-Inch Drilled Rotors for Ford Mustang S550 2015–2023

Red AERO4 service calipers and matching parking-brake hardware are combined with 14-inch drilled-and-slotted rear rotors. The kit's dedicated MC4 units, cable assembly and braided flexlines must be routed for the listed Mustang installation. Wilwood Engineering, founded in 1977 by Bill Wood, is based in Camarillo, California. The company designs and manufactures disc brake systems and supplies master cylinders, calipers, brake rotors, valves, fittings and lines for motorsport, street-performance and specialized installations. Select each component around the complete system’s requirements.

Technical Details

• Manufacturer: Wilwood
• Manufacturer part number: 140-13888-DR
• Kit classification: Rear Brake Kits - Street Performance
• Axle position: Rear Kits
• Brake Type: Disc; Parking
• Selling unit: Sold as a kit.
• Pistons per service caliper: 4
• Service-caliper piston construction: Stainless
• Service-caliper mount: Radial
• Caliper body construction: Forged aluminum
• Caliper Color: Red
• Caliper Finish: Red Powder Coat
• Caliper Inlet Port Diameter: 1/8-27 NPT
• Caliper family: AERO4
• Pad compound: BP-10
• Rotor Outside Diameter: 14.00 in; 355.6 mm
• Rotor Thickness: 0.81 in; 20.57 mm
• Rotor Material: Iron
• Surface Type: SRP Drilled & Slotted
• Rotor construction: Vented
• Bolt Circle Diameter: 5 x 4.5 in; 5 x 114.3 mm
• Catalog stud / mounting-hole reference: 0.630 in; 16.00 mm
• Rotor surface finish: Black Electro Coat
• Hat material: Aluminum
• Hat finish: Black E-Coat
• Hat offset dimension: 1.200 in
• Minimum wheel guidance (clearance drawing required): 18 in; 457.2 mm
• Required rear axle / flange: OEM
• Catalog axle-offset reference: 0.00 in; 0 mm
• Spindle Included: No
• Mounting Hardware Included: Yes
• Separate wheel hubs included: No
• Master Cylinder Included: No
• Brake Booster Included: No
• Brake Lines Included: Yes

Fitment & Compatibility

This rear conversion is for the specific 2015–2023 S550 Mustang trims listed below; no unlisted Shelby application should be assumed. DS-1078 includes rear hose kit 220-13913 and parking-brake cable assembly 330-15137. The separate MC4 calipers must be correctly aligned and the cable travel adjusted; verify wheel clearance around both service and parking calipers.

Listed models: Mustang. Use the fitment table below for the individual years, submodels and equipment conditions.

Wilwood product specifications · Installation instructions

Contact PMB Performance with the brake-kit identification and measurements for help selecting the part. Our team brings over 20 years of experience.