Looking under the hood of this Lexus GS300 will either make you smile or curse. In the engine bay the factory 2JZ has been replaced by a LS1 from a 2004 Pontiac GTO. The current engine setup is producing 320 horsepower and 340 ft-lbs of torque. The engine was installed using DGR Fabrication’s LS motor mount kit. Hanging off each side of the engine are a pair of hooker headers running into a stainless steel Borla exhaust. Head over to Speedhunters to see the full list of upgrades.