Motorized L4 Engine

BUILD YOUR OWN ELECTRICALLY DRIVEN INLINE-4 ENGINE

The engine that powers more cars on the road than any other design — now electrically driven and built brick by brick. This LEGO-compatible L4 inline-4 is one of the most mechanically transparent builds in the lineup — 1,787+ precision pieces that let you see every cam, chain, piston, and gear working together in real time. Guided by a full-color English instruction manual from first brick to last. Comes with a built-in electric motor and battery box — just add batteries. Most builders finish in 8–12 hours. Built for anyone who wants to understand exactly how an engine works — and watch it do it.

ALL FOUR PISTONS. EVERY CAM. FULLY EXPOSED. FULLY MOVING.

Watch all four pistons move in perfect firing sequence as the electrically driven crankshaft spins smoothly — cams rotating, timing chains looping, every internal component visible and in motion. The open cross-section design makes this unlike any other engine kit — you can see everything happening inside as it runs. No guessing, no mystery — just pure mechanical motion laid bare. LEGO-compatible bricks, ages 14+. The must-build for engineering students, car enthusiasts, and anyone who's ever wondered what's actually happening under the hood.