This is a perfect inexpensive upgrade for the '11-17 non-GS Regal that have standard brakes.  It includes all of the components needed to install the GS model Brembo brakes.

The standard Regal brakes are a far cry from a performance braking system. The 2.4L cars only have a tiny 11.7" rotor paired with a single piston cast caliper, and the standard 2.0L cars have a 12.6" rotor paired with a single piston cast caliper. This Brembo kit bumps you up not only in rotor size and braking surface area, but the aluminum brake calipers are lighter than the stock cast calipers. The Regal in top AWD trim can weigh nearly 4000lbs, so a proper braking system can make a world of difference. Wheel spacers may be needed depending on your stock wheels. 

Includes:

• GM Part # 22917417 and 22917418
• AC Delco Part # 172-2614 and #172-2615
• Power Stop Evolution Ceramic Brake Pads
• Pin Kit
• Brake rotors
• (2) Dust shields
• Mounting bolts 

Fits 11-17 Regal, in 2018 the bolt pattern changed.