In the horsepower department, the Pontiac GTO 6.0 engine doesn't disappoint: it clocks in at 400 horsepower, with 400 lb-ft of torque to boot. With this engine, the '06 GTO has been known to go 0 ...

This move resulted in the badge-engineered 2004-06 Pontiac GTO coupe and the even-shorter-lived 2008-09 Pontiac G8 sedan. The story of the 21st century GTO and G8 reflects the struggles that GM ...