The Lamborghini Aventador is an Italian supercar that costs several hundred thousand dollars, so very few can afford one. But what if you could build one for a fraction of that? Longtime car enthusiast Sterling Backus, who happens to work as chief scientific officer at KMLabs in Boulder, Colorado, found a way to make it possible. And in doing so, he fulfilled the dream of his 11-year-old son who had a blast driving an Aventador in the XBOX video game Forza.

Backus was able to get his hands on panel layouts through GrabCAD, an online community where designers and engineers can share models, and then he modified them for 3D printing. After that, he mounted the panels onto a hand-built steel chassis and installed a Corvette V8 engine for power—all with a budget of a little over $20,000.