The Xulian Overthruster was the upgrade to the Thrustmaster 500. It improved the speed of Aphelion drastically, and left a trail of smoke behind it as well. It was earned after collecting 35 Zoni. Due to its great speed, turning was slower and it was always better to let go of the overthruster to corner. Like the Thrustmaster 500 Ratchet could not attack when the Xulian Overthruster was enabled