LS Gen III small-block: The Chevrolet LS1 and LS6 series engine was the third generation of Chevy small-blocks and was first introduced as the LS1 in the 1997 Corvette and was also used in the 1998-2002 Camaro Z28. Variants of this engine are available in displacements of 293 cid (4.8L), 325 cid (5.3L), 346 cid (5.7L) and 364 cid (6L).