Before anything else... some related news...
The current Northstar V8 engines found in Cadillac vehicles were due for replacement in 2010, however brisk sales of the new V6 model STS caused the company to reconsider building a V8, according to Automotive News. The 3.6L V6 in the STS produces 302hp compared to the 4.6L V8 churning out 320hp. In addition, the V8 engines weigh around 150-200 pounds more than the V6. It’s now likely Cadillac will switch to V6 engines in all models except the high performance V-variants, which could use Corvette V8s.
The new 2009 Cadillac CTS-V with its 550hp 6.2 liter LSA Supercharged OHV V8. It will be available with a 6-speed manual or a 6-speed automatic.