4L4 fusial thrust engine

Sources

Star Wars: X-Wing Deluxe Book and Model Set
Star Wars: Rogue One: The Ultimate Visual Guide
Star Wars Helmet Collection 71
Star Wars Helmet Collection 75
Rebel Starfighters Owners' Workshop Manual
Star Wars: The Galactic Explorer's Guide

Non-canon sources

LEGO Star Wars in 100 Scenes

Appearances

"The Weapon of a Jedi, Part 1" — Star Wars - Magazine 19 (Unknown)

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