Modified BMW 135i - One Take

This "full bolt-on" BMW 135i runs the JB4 tune that so many BMW enthusiasts keep telling me to try, a blend of ethanol, and a coilover suspension on good tires. Now that these 135i's have come down in price on the used market, are these as good for tuning as we hoped?

Have a look on WheelWell
https://wheelwell.com/profile/55119384e7837ec857a2fa1c/vehicles/551193a0e7837ec857a2fa1d/specs/?location=register&origin=Prompt