With testing from Car & Driver and Motor Trend,, we know for a fact that the BMW-sourced B58 inline-six that powers the 2020 Toyota Supra is even more powerful than advertised. But how powerful can it get? Is it tunable to 600 horsepower? Maybe 700 or 800 horsepower? What about 1,000 horsepower? Well, that four-digit figure is exactly what Papadakis Racing is trying to accomplish. That figure isnt that unheard of for the Supra. Maybe not the 2020 A90-gen Supra, but the third-gen Supra was tuned to the moon and back, and four-digit horsepower numbers were in a sense relatively easy to attain if you know your stuff. The real question is whether or not the BMW B58 inline-six can handle a similar power output and, if so, how much of the engine has to be changed? Luckily, we have an entertaining video that shows the entire build process of an alleged 1,000-horsepower B58 build, right from the block on up.