Modifying an iconic vehicle like the E30 BMW M3 comes with its fair share of risks. Purists tend to dislike any alterations to the formula they love. However, Manhart Classic Cars has created a special build called the MH3 3.5 Turbo that is likely to attract respect from all corners of the enthusiast realm. The “3.5” in the name refers to the engine displacement.

Yes, E30 fans, this means the beloved high-revving four-cylinder engine has been replaced with a larger inline-six. However, the engine is not a new one. In keeping with the classic nature of the car, Manhart has opted for the 3.5-liter inline-six from the Alpina B7 S Turbo. This engine takes us back to the E12-era BMW 5 Series. But Manhart hasn’t stopped at just an engine swap. They have also made unspecified modifications to the turbo and intercooler, along with adding a Manhart exhaust system. These upgrades result in an impressive output of 405 horsepower and 479 pound-feet of torque. Power is sent to the rear wheels through a five-speed manual transmission.