Project IJ LS3 Engine

LS3 Engine + Firewall STL Pack

Drop-In Scale Engine Model Designed for Project IJ Builds

This STL package provides a detailed LS3 engine model with integrated firewall, designed specifically for use in a Project IJ build on a VS4-10 chassis.

This engine was modeled around real drivetrain constraints and servo placement, so it fits where it’s supposed to.

This listing is for digital STL files only.

Designed For

• Project IJ builds

• VS4-10 chassis

• H10 axle servo placement

• Project IJ shock towers

  ⚠️ This engine requires a stubby kit when used with the VFD transmission.
  It is recommended to trim the front of the VFD skid for proper clearance.

  This engine is designed to work with the Project IJ shock towers.
  If using standard VS4-10 shock towers, trimming will be required.

Fitment was designed around this configuration. Other transmission or axle combinations may require modification.

Integrated Features

• LS3 engine block with accessory detail

• Integrated firewall positioned for correct Project IJ fitment

• Intake system

• Intake support tab designed to interface with the welded front bumper system but can be used without it if glued

The intake support is designed to tie into the bumper structure for a clean and rigid installation.

What You’re Purchasing

• Digital STL files for:

  • LS3 engine assembly

  • Firewall

  • Intake and intake support

No physical parts are included.

Printing & Installation Notes

• Designed for standard FDM printing

• Designed for scale appearance

Important Notes

• Designed specifically for Project IJ

• Requires VFD + stubby kit

• Recommended to trim front of VFD skid

• Built around H10 axle servo clearance

• Intake support intended to pair with the welded bumper system

• All designs © Harley Designs Inc.