Black Rock just announced both premium and free content upgrades for smash-racer Split/Second, the former of which is already available for download.
The Elite Vehicle Livery pack bumps up skins for Elite vehicles Brawn, Vixen, and Raptor. This is free.
The second bit is the High Octane Supercar Pack, which adds three brand new cars. There's also a new skin for the Ryback Cyclone.
It'll cost $2.00 or 160 MSP. You can grab this right now, seemingly.