either advancing or retarding the camshafts to allow for optimum engine performance, reduced emissions, and increased fuel efficiency. The VCT system is used in Ford's Triton 5.4L 3-valve V8 engine; the Australian Barra 182 and 240 Inline-6s ; Ford's 4.6L 3-valve V8 engine used in the 2006-present Ford Explorer and 2005-present