YouTube user Eric Harrell created a fully-functional 3D-printed Subaru EJ20 WRX engine. At a scale of 35%, the model has functioning pistons, pulleys and more. (35% of an EJ20 would be an EJ7, right?)
The best part? You can make your own! Eric posted a link to his build on Thingiverse with instructions. Check out his YouTube channel for even more crazy 3D-printed car stuff like this super complicated Toyota 4WD transfer case. We’re livin’ in the future!