The single overhead cam V6 introduced in 1993 was a major advancement for Chrysler. It was derived from Chrysler's first homegrown front-wheel drive V6, the Chrysler 3.3 engine. The SOHC V6 has been replaced by the Chrysler Pentastar engine.There are three major variants of this basic design: the 3.5 L, 3.2 L, and 4.0 L. Additionally, a 2.7 L DOHC version was derived. The line was expanded further for 2006 with the addition of the 4.0 L engine debuting in the Dodge Nitro.