Star Wars X-Wing (2nd ed): TIE/rb Heavy Exp. - Rules of Play says:

The TIE/rb Heavy Expansion Pack includes everything you need to add one of these imposing ships to your Galactic Empire squadrons, beginning with a beautifully detailed, pre-painted miniature and a medium plastic base. Four ship cards give you the freedom to choose your pilot, while 12 upgrade cards invite you to customize your ship to fir your needs. Finally, two Quick Build cards offer helpful combinations of pilots and upgrades to get you into the fight right away.