Some articles on caliburst:

Huffer (Transformers) - Transformers: Power Core Combiners - Toys
... Power Core Combiners Huffer and Caliburst (2010) Huffer is an Autobot semi-truck partnered with the Mini-Con Caliburst ... His partner Caliburst transforms into a gun that can mount on the rear end of his truck mode ... Huffer and Caliburst are also repainted as the Decepticons Crankcase (with Destron drones) and Darkray (Windburn's Mini-Con partner), respectively ...