STS |
||||||
| Year | Engine | Original Power | Stage 1 | Difference | Vmax | ECU |
| 2005-2007 | 3.6L | 255 Hp 255 ft·lb | 280 Hp 280 ft·lb | 25 Hp | E55 | |
| 2006-2010 | 4.4L | 469 Hp 439 ft·lb | 500 Hp 480 ft·lb | 31 Hp | ✓* | E67 |
| 2006-2010 | 4.6L | 320 Hp 315 ft·lb | 355 Hp 340 ft·lb | 25 Hp | ✓* | E67 |
| 2008-2009 | 3.6L | 302 Hp 272 ft·lb | 325 Hp 295 ft·lb | 23 Hp | E69 | |
*Depends on the software version