HD 5-D
this experimental hyperdrive booster first hit the market after the Battle of Yavin. It functioned by shunting more power through a starship's engines that what would normally be allowed, making its hyperdrive more powerful and reducing transit times. However, this practice of overloading the engine systems was as dangerous as it was alluring, and the HD 5-D has a tendency to burn out after several uses, causing great damage to the main drive systems.