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Subaru WRX EJ20 Boxer Engine Model - Fully Functioning preview

Files (15)

oil_pan_-_electric_motor_-_no_electronics_Scaled.stl
STL
531.3 KB
Piston_scaled.stl
STL
197.0 KB
Flywheel_scaled.stl
STL
699.5 KB
Exhuast_Valve_scaled.stl
STL
113.4 KB
Oil_pan_drive_gear_scaled.stl
STL
72.2 KB
Timing_Pulley_scaled.stl
STL
53.5 KB
Tensioner_pulley_scaled.stl
STL
58.9 KB
Intake_Manifold_scaled.stl
STL
1.4 MB
Valve_spring_puck_scaled.stl
STL
21.9 KB
Connecting_rod_bearing_cap_scaled.stl
STL
54.8 KB
Cam_Spacer_3_scaled.stl
STL
18.1 KB
Crankshaft_5_scaled.stl
STL
102.5 KB
Crankshaft_6_scaled.stl
STL
96.7 KB
Connecting_rod_scaled.stl
STL
67.9 KB
Water_Pump_scaled.stl
STL
403.1 KB

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PETG filamentAmazon · Affiliate linkAmazon product page for 1.75 mm PETG; confirm colour, spool size, print temperature, seller, and delivery region.Check price at Amazon
ASA filamentAmazon · Affiliate linkAmazon product page for 1.75 mm ASA; use an enclosure and suitable ventilation, and confirm seller and regional availability.Check price at Amazon

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Mechanical/Functional

Subaru WRX EJ20 Boxer Engine Model - Fully Functioning

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CC BY
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The file license permits commercial reuse, subject to any applicable attribution or share-alike terms. License status does not verify vehicle fitment, OEM rights, design patents, or safety.

MC

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Michael Chen
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Description

See updated cutaway version of the EJ20 can be found here. Complete hardware kits are made for the updated cutaway model. Kits include all non printed parts, 500 rpm dc motor, speed controller, power connectors, and DC power supply. It's fully functional as in all parts move as intended in the real thing. Do not confuse it with a real engine, as this is not. This engine is slightly harder to print and assemble than my Toyota 22RE engine. So it is best to print or familiarize yourself with my previous models if you choose to print this one. The scale is once again 35% of the original which seems to be a good size for printing and finding fasteners that work and look right. The tolerances are a little tighter and depending on your printer the crankshaft might take some tweaking to get it right so that there is not interference while rotating.

Compatible Vehicles

Published Mar 8, 2026Updated Sep 14, 2026

Originally published on thingiverse.com · License: CC BY

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