supercharged LSA V-8, based on the LS9 V-8 from the Chevrolet Corvette C6 ZR1. It produces and of torque. The choice to use a pushrod engine (OHV) arrangement is unique in the luxury performance sedan market where competitors typically use dual overhead camshaft (DOHC) engines. The engine is produced in GM's Silao, Guanajuato, Mexico engine assembly plant. The LSA engine has a bore x stroke of . The engine block is cast aluminium 319-T5 alloy with cast iron cylinder liners. The crankshaft is forged steel using powdered-metal connecting rods. Pistons are high-silicon Hypereutectic Aluminium alloy replacing the forged aluminum used in the LS9 engine. The compression ratio is 9.1:1. The cylinder heads are based on the Corvette's LS3 head and are cast from type 356-T6 Aluminum alloy. The exhaust manifolds are cast iron. The supercharger is a twin four-lobe screw compressor-type unit displacing . It is Eaton's Twin Vortices Series (TVS) generating a maximum boost of . Intake air is cooled with a water-to-air intercooler built directly into the supercharger unit. Transmissions There are manual and automatic transmission choices. The manual is a Tremec TR-6060 six-speed transmission with a short-throw shifter, twin disk clutch and dual-mass flywheel. The 6L90 automatic is a paddle shift conventional (planetary gearing and torque converter-based) automatic six-speed. CTS-V sedan Production of the CTS-V sedan began in the summer of 2008 in the Lansing, Michigan GM plant. Total production of the CTS-V for the 2009 model year was approximately 3,500 out of approximately 59,716 CTS model production. The 2009 CTS-V has a base price of US$59,995, and was available for purchase as of November 1, 2008. Standard features include: leather seats, lateral acceleration gauge, 19-inch aluminum alloy wheels, Michelin Pilot Sport PS2 tires, a built-in 40GB hard drive to store music, and LED flash tracers to tell the driver when to shift. Options include polished wheels, sunroof, navigation system and, for the first time, Cadillac offers 14-way adjustable performance Recaro seats. The official 0- time for the second-generation CTS-V is 3.9 seconds, while the quarter mile is run at 12.0 seconds at . These numbers were duplicated by Road and Track magazine (0-60 mph in 3.9 seconds for the automatic and 4.1 seconds for the manual). Coinciding with the release of General Motors' Viability Plan, the automaker has disbanded its High Performance Vehicle Operations team, the crew responsible for the line V-series Cadillacs, the Chevrolet Cobalt