Here is a list of all the cars the LS1 was offered in. And for what its worth, many of these cars have slight differences in the motor. If the in game cars start out with different power, then the end result would be different numbers. Pre 2001 the LS1 used the LS1 intake manifold. Post 2001 the LS1 used the LS6 manifold (possibly the reason why the stock numbers are altered, thus the end result is different since all part increase using a percentage)
* 1997-2004 Chevrolet Corvette C5, excluding Z06
* 1998-2002 Chevrolet Camaro Z28, SS
* 1998-2002 Pontiac Firebird Formula, Trans Am
* 1999-2005 Holden Commodore Ute
* 1999-2005 Holden Commodore (VT, VX, VY, VZ)
* 1999-2005 Holden Statesman (WH, WK, WL)
* 1999-2005 Holden Caprice (WH, WK, WL)
* 1999-2004 Holden Special Vehicles Clubsport (VT, VX, Y Series)
* 1999-2004 Holden Special Vehicles Clubsport R8 (VT, VX, Y Series)
* 1999-2004 Holden Special Vehicles Grange (VT, VX, Y Series)
* 1999-2004 Holden Special Vehicles GTS (VT, VX, Y Series)
* 1999-2004 Holden Special Vehicles Maloo (VT, VX, Y Series)
* 1999-2004 Holden Special Vehicles Senator Signature (VT, VX, Y Series)
* 2000-2002 Holden Special Vehicles Senator 300 (VX)
* 2000-2002 Holden Special Vehicles Coupé GTO (VX)
* 2000-2002 Holden Special Vehicles Coupé GTS (VX)
* 2000-2002 Holden Special Vehicles SV300 (VX)
* 2000-2004 Holden Special Vehicles Maloo R8 (VX, Y Series)
* 2001-2001 Opel Omega (prototype)
* 2001-present Mosler MT900
* 2003-2004 Holden Special Vehicles Clubsport SE (Y Series)
* 2003-2004 Holden Special Vehicles Coupé LE (Y Series)
* 2003-2004 Holden Special Vehicles Coupé4 AWD (Y Series)
* 2003-2004 Holden Special Vehicles Avalanche XUV (Y Series)
* 2003-2004 Holden Special Vehicles Avalanche XUV AWD (Y Series)
* 2001-2005 Holden Monaro CV8
* 2004 Pontiac GTO
* 2006–present Elfin MS8 Streamliner
* 2006–present Elfin MS8 Clubman