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
Review: 42059 Stunt Truck + 42058/42059 combiner - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
LEGO Technic: Stunt Bike (42058) & Stunt Truck (42059) NEW! SEALED! | eBay
Lego Technic 42058 & 42059 | The Lego Car Blog
LEGO 42059 Stunt Truck Set Parts Inventory and Instructions - LEGO Reference Guide
LEGO Technic (42058 + 42059), Power Racer - building instructions - YouTube
LEGO 42059 Stunt Truck Instructions, Technic
LEGO 42059 Stunt Truck Set Parts Inventory and Instructions - LEGO Reference Guide