Unveiled at the 2013 New York Auto Show (in coupé form), followed by the 2013 Frankfurt Motor Show (in convertible and coupe form), the Camaro Z/28 is a high performance variant of the Camaro SS with a full aerodynamic package designed for optimum performance during track driving. The package includes a large splitter connected to an underbody panel, fender flares over the front and rear wheels, extended rocker panels, redesigned rear spoiler and a functional diffuser. Other changes include interior trim in matte-metallic Octane finish, a flat-bottomed steering wheel, standard Recaro seats with microfiber suede inserts and manual adjustment, elimination of the seat-back pass through, high-density foam in place of the rigid structure of the seat back and steel mesh of the seat bottom, a 7.0 L LS7 V8 engine co-developed with Corvette Racing, racing-style cold-air induction system with large K&N air filter, standard dual mode exhaust system with larger-diameter pipes, Tremec TR-6060 6-speed manual transmission, limited-slip differential with a helical gear set, 19-inch diameter wheels with Pirelli P Zero Trofeo R 305/30ZR19 tires, Multimatic DSSV spool valve dampers, Brembo Carbon Ceramic Matrix brake discs (394 x 36 mm front and 390 x 32 mm), monoblock calipers (6-piston front, 4-piston rear), elimination of tire inflating kit (except for units sold in Rhode Island and New Hampshire), deletion of interior sound deadener and carpeting from the trunk, replacement of the standard LN4 battery with LN3 battery, replacement of the standard 3.5 mm glass with thinner 3.2 mm glass for the rear window, removal of HID headlamps and foglights and the removal of air conditioning (available as a stand-alone option).