BMW M3 GT4 Is A 900-HP Build That BMW Has Yet To Make

Instagram is perhaps one of the best platforms to check out interesting car builds, like this Bimmer built like an M4 GT4. But looking closer, the vehicle has four doors, meaning this is the M3 G80. However, this build has more surprises, such as a rebuilt powertrain capable of astronomical numbers.

Jacked up by 400 horsepower, the rebuilt 3.0-liter S58 engine paired with hybrid turbos can produce up to 900 hp. Power is sent to the rear wheels via a six-speed manual transmission – sounds a lot like fun for track days. It also gets a long list of powertrain modifications, such as an improved cooling courtesy of CSF Radiators.