A Steam Community Group Announcement has word on a major patch for DiRT Rally on Steam, adding a bunch of new content in what they call the Tarmac Terrors update for the Early Access racing game. The post also states they have "a really exciting summer of content and updates planned." Here's word on what's new:

Month three of DiRT Rally and our next big update is now live. Version v.0.5 - more commonly known as the Tarmac Terrors update - has now been added to DiRT Rally; it’s fast paced, technical and is going to require all your focus. Here’s the full run down of what you can expect in this month’s update.

New

• 12 new rally stages based at Baumholder in Germany
• Owners Club Online Events – A second DiRT Daily where you compete in your own car
• A second weekly event where we’ll be experimenting and throwing new challenges at you
• 5 new rally cars featuring new Group B RWD & Kit Car Classes
• Opel Kadett GT/E 16v
• Opel Manta 400
• Lancia 037 Evo 2
• Seat Ibiza Kitcar
• Peugeot 306 Maxi
• New calibration and options screens in “Advanced Wheel Settings” (added in v.0.4.5)