Mattel MEGA Hot Wheels '77 Pontiac Firebird Collectible Building Set with Diecast and 843 pieces. Brand new, pieces completely sealed and unopened. Box opened and re-sealed to ensure all inside pieces were sealed. Like a racing trophy, this Adult Builders edition of the iconic '77 Pontiac Firebird is made for your display case. This large-scale racecar is authentically designed with deluxe features like doors and trunk that open, an opening hood with removeable engine and interior details. This retro icon may have been made for high performance, but now it's built to show off.