LS1 is the engine designation, introduced in 1997.
(Large Scale Integration.) I think it means that there are more features added than on the first model. (4WD, A/C, daytime running lights, etc.)
Chevrolet Corvette was created in 1953.
The 2003 Chevrolet Corvette has 16 valves.
The 2007 Chevrolet Corvette has a V8 engine.
The 2001 Chevrolet Corvette has a V8 engine.
The 2002 Chevrolet Corvette has a V8 engine.
The 2003 Chevrolet Corvette has a V8 engine.
The 2009 Chevrolet Corvette has a V8 engine.
The 2011 Chevrolet Corvette has a V8 engine.
The 2012 Chevrolet Corvette has a V8 engine.
The 2008 Chevrolet Corvette has a V8 engine.
The 2012 Chevrolet Corvette has 16 valves.