X-53 Touring Rocket is a special mount that players can earn only through the Recruit-A-Friend (RAF) program. The X-53 is available to players claiming their RAF reward after April 27, 2010. Players who already claimed the [Swift Zhevra] mount must complete another RAF to claim an X-53 mount. This mount was discontinued and replaced by the [Obsidian Nightwing] on July 16th, 2012.
New Recruit-A-Friend Mount Coming Soon | 2010-04-06 09:00 |Bashiok
Beginning in just a few days, players who participate in the Recruit-A-Friend program will receive a whole new reward for showing a friend the ropes in Azeroth: the X-53 Touring Rocket, a two-seater flying mount that automatically increases its speed as your mount skill improves (up to 310% speed if you already have a 310% mount). The X-53 will be replacing the current Zhevra mount reward, which is retiring from the Recruit-A-Friend business after a good run. If you've already claimed a Zhevra (or claim one prior to the change), you’ll be able to hang on to it, of course. We’ll have more details on the new Recruit-A-Friend mount once it becomes available.
New Recruit-A-Friend Mount Coming Soon | 2010-04-06 10:06 |Bashiok
If you've claimed your Recruit-A-Friend gift and received the Zhevra you'll need to refer a new friend (thus gaining a new reward to redeem and claim after this change) to also obtain the X-53 Touring Rocket.
If you have a reward waiting around you have not claimed it can be used to claim a Zhevra now, or you can wait and claim an X-53 after the change.
/Patch 4.0.1 (12-Oct-2010): Can now be used as a ground mount in addition to being a flying mount.
Hotfix (2010-04-27): "Time is running out for those who wish to claim their Zhevra, as the launch of the X-53 Touring Rocket is now scheduled for tomorrow, Tuesday, April 27! If you’ve fulfilled all of the Recruit-A-Friend requirements necessary to claim a mount now but choose not to claim the Zhevra, you will be able to claim the X-53 Touring Rocket instead once it launches. Sounds like they’re firing it up for a final test run now..."