Get ready for the new content of 2021 Season 4 with a new slate of Week 13 series to cap off 2021 Season 3! Featuring the debuts of the Porsche 911 GT3 Cup (992), Ferrari 488 GT3 Evo, and Hungaroring—all of which are in the latest Shiny New Shakedown—and Hickory Motor Speedway, the new schedule is one you won’t want to miss.
Official
Oval
- 13th Week Street Stock Challenge
- NASCAR iRacing Series – Open
- NASCAR iRacing Series – Fixed
- NASCAR iRacing Class C Series
- NASCAR iRacing Class B Series
Road
- 13th Week Mazda Cup
- 13th Week Ferrari GT3 Challenge – Ferrari 488 GT3 Evo
- 13th Week Porsche Cup Series – Porsche 911 GT3 Cup (992)
Dirt Oval
- 13th Week Dirt Street Stock Challenge
- 13th Week DIRTcar UMP Modified Fixed
Dirt Road
- 13th Week iRacing RallyCross Series
- 13th Week iRacing RX Lite
Fun Series
Oval
- Pickup Cup
- Dallara Dash
- Carburetor Cup
- 13th Week Silly Send It – Tour Mod vs. Silver Crown
Road
- 13th Week Shiny New Shakedown – Ferrari/Porsche at Hungaroring (after build)
- 13th Week GT3 Challenge Fixed – GT3s (after build)
- 13th Week iRacing Figure GR8 – Global MX-5, Pro 2 Lite
- 13th Week Tube Frame Twister – NEXT-GEN
- 13th Week Ridiculousness – Lotus 49, Lotus 79, IR-18
- 13th Week Tin Top Tussle – Audi RS3 LMS
Dirt Oval
- Sling Mud for Fun – Sprint Cars
- 13th Week Super Slide – Pro 2 Lites
- 13th Week Muddy Mess – Wingless 360 Sprints
Dirt Road
- 13th Week Identity Crisis – Dirt Legends
Time Attack
- Soap Box Challenge – Formula Vees (low fuel) on Mt. Washington Descent
