Marshall Pruett has released the final two GTP tech tours. Marshall really did a solid job with this series! It's not an extreme tech tour with the proviso you have a mechanical engineering degree in order to make heads or tails of it, and it's not mind-numbingly dumb and scant of any meaningful details like you'd typically see from nascar people. It's prepared perfectly towards the fanbase as a whole!
Cadillac ->
https://www.youtube.com/watch?v=-xqRB0hi12U
Porsche ->
https://www.youtube.com/watch?v=3wSu...st=WL&index=16
Enjoy, guys!