SUBARU EJ25 STI BOXER 4 ENGINE KIT
Build It. Understand It. Display It.
Capture the unique character of Subaru’s iconic EJ25 STI engine — a 2.5 L turbocharged flat-four renowned for its balance, power, and unmistakable rumble. Built entirely from 100 % genuine LEGO® elements, this detailed miniature recreates the horizontally-opposed layout that defines Subaru’s engineering DNA. Perfect for fans of rally heritage, mechanical design, and the art of motion.
WHAT YOU’LL BUILD
A scale model of the Subaru EJ25 2.5 L turbocharged flat-four, showcasing the distinctive boxer configuration with opposing pistons. The model features detailed turbo placement, realistic head design, and smooth, synchronized internal motion — a perfect tribute to Subaru’s STI performance legacy.
WHAT’S INCLUDED
All 100 % genuine LEGO® elements
Access to online, view-only digital build instructions
WORKING FEATURES
Functional boxer-style crank and piston motion with opposing cylinders
Detailed turbocharger assembly with intake and exhaust routing
Dual overhead camshafts per bank for authentic flat-four geometry
Freestanding design — stable when displayed on its sump
SPECIFICATIONS
Approx. 330 pieces
Dimensions: 15 cm (L) × 11 cm (W) × 10 cm (H)
Build time: 3 – 4 hours
Skill level: Advanced
Display: Freestanding on sump or compatible with optional Mechanical Miniatures stand or crane
SHIPPING
All kits are made to order in Western Australia.
Engine kits ship in 7 business days
Larger or custom sets ship in up to 14 business days
DISCLAIMER
Mechanical Miniatures is an independent designer and is not affiliated with or endorsed by Subaru Corporation, Subaru Tecnica International (STI), or the LEGO Group. For ages 14 + — contains small parts.
FAQ
Q: Does the boxer motion actually work?: Yes — rotate the crankshaft and all four pistons move in opposing pairs, exactly like the real EJ25’s flat-four design.
Q: Are instructions printable?: Instructions are provided online as view-only digital files to protect design integrity and allow easy updates.
Q: How does it display?: Each engine can freestand securely on its sump or be mounted on an optional Mechanical Miniatures stand or crane (sold separately).