Lego Technic combinations: beast on the left side is 42072+42073 (BASH and WHACK) while beauty on the right side is 42058+42059 (STUNT TRUCK and STUNT BIKE). : r/lego
Buyr.com | Building Sets | LEGO Technic WHACK! 42072 Building Kit with Pull Back Toy Stunt Car, Popular Girls and Boys Engineering Toy for Creative Play (135 Pieces)