L4 Engine

BioBricks Verified independent store

→

It's Not a Model. It Actually Runs. Other brick sets hide everything behind a shell. This one shows you every single part moving. You build the BioBricks Inline-4 Engine with your own hands. Then you flip the switch. The cams spin, the timing chain loops, all 4 pistons fire in perfect sequence — completely exposed, nothing hidden. This isn't a display piece. It's the engine that powers more cars on the road than any other, laid bare for you to watch. What you get: 🔍 A fully open design — every part visible while it runs. No guessing what's happening inside. ⚙️ All 4 pistons fire in sequence — cams spinning, timing chain looping, everything moving in real time. 🎓 The most "aha" build in the lineup — watch exactly how an engine actually works, right in front of you. 🔧 1,787+ pieces to build — hours of satisfying, screen-free build time. 📖 Zero guesswork — full-color instructions walk you through every step. 🔋 Ready out of the box — motor and battery box included. Just add batteries and go. Build it once. Understand it forever. Show more