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
Amazon.com: LEGO Technic BASH! 42073 Building Kit (139 Pieces) : Toys & Games
Amazon.com: LEGO 42073 Technic BASH! : Toys & Games
LEGO Technic 42073 Bash! 139 pcs Pull Back Crash Race Car | eBay