2006
The 2006 V-series STS-V was introduced at the 2005 Detroit Auto Show. It features a supercharged 4.4 L version of the Northstar V8, along with handling upgrades. This engine is certified by the SAE to produce 469 hp (350 kW) and 439 lb·ft (595 N·m).
In 2006, Cadillac introduced a stretched STS called the SLS. It is assembled by Shanghai GM, and in 2007 it was shown at the Middle East International Motor Show in Dubai. The SLS adds 3.9 inches (99.1 mm) of rear-seat legroom and has a different interior with higher quality materials.
Read more about this topic: Cadillac STS