AutoShack Front Brake Rotors, Premium Pads & Calipers for Buick, Regal 2016, AWD FWD L4 2.0L – 12.64″ (321 mm), 5-Lug. Distributed by AutoShack. ISO / IATF 16949 certified for quality and safety. Sleek Brake Calipers provide enhanced protection against corrosion and wear.