400WHP BMW E30 325i Turbo - Dyno Runs

A few dyno runs of a BMW E30 325i, fitted with a turbocharged version of the OEM M20B25 engine. The car made 305kw at the wheels (409hp), and 496nm of torque - a big improvement from the standard power figure of 125kw.
No background music or talking - just the raw audio of the sound of the car on the dyno.
Shot in 4k on a Canon EOS R with a 16-35mm f2.8 lens, and a Samsung Galaxy S23 Ultra.