Hartge is a well known German BMW Tuner and also an official car manufacturer. http://www.hartge.de
Hartge has some done various V8 engined BMW cars based on the E36 / E46 3-series and also Z3/Z4.
Hartge Z3 Roadster 4.7
year: 1997 (only 1 built)
Engine: 4.7l V8, 350 hp, 500 Nm
6-gear Getrag transmission, 3:15 rear differential ratio, M-Roadster brakes, Hartge coil-over suspension, Hartge Classic 19" wheels, fiber-glass hood with air vents.
4.7 liter V8 engine
Hartge Z3 Roadster 4.7 and Z4 Roadster 5.0 at Hockenheim race track 02/20/2004
Hartge Z3 Coupe 4.7
Hartge Z3 Coupe 5.0
Hartge E36 Compact V8
Hartge Z4 Roadster 5.0
Hartge H50 E46
Hartge H50 Kompressor