We have posted the Provisional 2019 ST5 and ST6 Rules! You can download them from the NASA website rules page or the ST website.
With the addition of ST6, we will be deleting the remainder of the Performance Touring classes and putting that series to bed. TTD, TTE, and TTF will all go away at the end of this season.
As usual, ST6 will correlate to TT6 in Time Trial.
Please note the additional minor changes that will impact ST5. All changes are in blue text.
See you at COTA!