The BMW E39 series came with very wide variety of engines. There were 14 different inline-six and five different V8 engines that found their way into the E39 chassis. This 1999 BMW 525it wagon was a custom order from BMW with Mojave metallic brown paint. The owner removed the stock motor, transmission and suspension for something else.
The engine was swapped for a Thomson Automotive built GMPP LSX 427 (7.0 L) which consists of an iron block with LS7 internals and will make around 600 horsepower. The engine and transmission mounts were purchased from a forum member. The transmission is a Tremec Magnum XL which is a TR6060 model with a T-56 tail section added. The rest of the drivetrain consists of a BMW M5 2-piece driveshaft with GM slip yoke and M5 differential with a gear ratio changed from the factory 3.15 to a 3.62 from a BMW E46 M3.
The build gallery is fantastic and has 586 beautiful photos at the time of writing.