| Specification | LS1 (Gen III) | LS2 (Gen IV) | LS3 (Gen IV) | | ---------------------- | ------------------------------------ | ------------------------------------ | ------------------------------------ | | | 1997 – 2005 | 2005 – 2009 | 2008 – 2017 | | Displacement | 5.7L (346 ci) | 6.0L (364 ci) | 6.2L (376 ci) | | Bore x Stroke | 3.898" x 3.622" | 4.000" x 3.622" | 4.065" x 3.622" | | Compression Ratio | 10.25:1 | 10.9:1 | 10.7:1 (approx.) | | Horsepower (Stock) | 305 – 350 hp | 400 hp | 426 – 436 hp | | Torque (Stock) | 300 – 365 lb-ft | 400 lb-ft | 420 – 425 lb-ft | | Redline | ~6,000 rpm | 6,500 rpm | 6,600 rpm |

1. Decoding "GSM" and "AK": GM Manufacturing and Casting Marks

Introduced in the 1997 Chevrolet Corvette, the 5.7-liter (346 cubic inches) LS1 revolutionized the pushrod V8. It features an aluminum block, a 3.89-inch bore, and a 3.62-inch stroke. Armed with "cathedral port" cylinder heads, the LS1 originally produced 345 horsepower. It set the standard for high efficiency, high-RPM stability, and incredible durability in a lightweight package. 2. The LS2: The Gen IV Evolution

At the surface level (LS1), Ghost in the Shell operates as a masterclass in genre filmmaking. It introduces Major Motoko Kusanagi, a cyborg operative of Section 9, as she hunts a mysterious hacker known as the Puppet Master. This layer is defined by its kinetic energy and its pioneering aesthetic. The "LS1" experience is the "solid" essay of visual storytelling—tangible, immediate, and striking.