The Solstice has some nice advantages,

275mm tires fit the wheel well front & rear

They are light, 2877 right out of the box

Parts right from the GM get you to 29psi
http://www.gmpartshouse.com/19212670-lnf-turbo-upgrade-kit


I was told the 37mm restrictor only chokes it’s turbo 6mm ( I can’t confirm)

I was thinking that if the Honda S2000 is too much for STL then maybe the GXP has shown itself as too much for STU

I know it’s not all the motor, I saw the runoffs time card pdf