An evolution of the original "Slim 4", this latest pre-production car is owned by Chris Doughty - former European Champion. Chris left a factory drive at Losi to drive the S4 for Atomic Carbon (and B4 for CML).

More than just a new name, the car actually has a unique chassis - a thick and very trick looking carbon fibre moulded tub design. This eliminates the need for an upper deck and also does a good job of sealing out the dirt.

The shell isn't ready yet, I saw both an early pull from the mould and the final mould its self. I wasn't allowed any photos of the unfinished shell but its rather nice.