My car has a downpipe and flex-fuel, so there is no added aero or suspension. Consistently taking the car 150+ in Mexico, it gets really shaky past 130ish. It is by no means unbearable or crazy unstable, just far less stable than the comparable German cars I have driven. 100-130 is perfect...
I am a fairly new owner and have little prior experience modifying cars. I plan to eventually go to a big turbo wanting around 800whp. In that, I have been keeping an eye on the market for intake manifolds and Pi systems and have come across a deal for an ams performance manifold (typically...