The story
History: facts, each with its source
The GR V6 replaced the VZ V6 in Toyota's light trucks. The 4.0L 1GR-FE went into production in 2002 and Wikipedia lists it in the 4Runner, the Tacoma, the Tundra, the FJ Cruiser and the Land Cruiser.1
The first version varies the timing of the intake cam only. A dual VVT-i update, which varies both cams, went into the 4Runner from 2009, the FJ Cruiser and the Tundra, and makes 267 hp on regular fuel.1