Before 1981, performance was simple. Auto manufacturers just created bigger engines, more cylinders, and louder exhausts like the Pontiac 7.5L V8 engine, used in models like the GTO, Firebird Trans Am ...
Engineering Explained on MSN

Twin scroll turbocharger - explained

How twin scroll turbochargers work.Twin scroll turbo chargers split the exhaust portion of the turbocharger into two channels, separating the incoming exhaust pulses. This maximizes the efficiency of ...
click above image to view high-res pics of the 2008 Volvo S80 T6 Turbo AWD Volvo has given the S80 line a little more power and traction with the introduction of the T6 Turbo AWD edition. The T6 ...