The first Audi TT's (similar aerodynamics as Ours) were extremely dangerous and subsequently decklid spoilers had to be installed.

Crossfire spoiler like Porsche are designed and tested to ensure that maximum safe roadabilty at high speed that we can attain with our cars.

Even SRT6 work like former Porsche Whaletails they used to have on Turbo Carrera's, those German's have aero down pat and why I bought my Crossfire.