Welcome to the enthusiasts’ technical resource for the 205 hp General Motors (GM) Ecotec 2.0L four-cylinder supercharged engine (RPO–LSJ). This engine, which powers the 2005-7 Chevrolet Cobalt SS Supercharged and 2004-7 Saturn Ion Red Line performance vehicles, and is also available as a crate engine (P/N12499466), has a strong following on the street for its [...]