Today I had my Autosound high flow cat converter installed, I took a look at the pipe and it was fine, so its a quasi cat back exhaust, all by Magnaflow and some by GM :p. Installed $250.
A minor change in sound, a bit more rumble, still very quiet at idle, just how I like it.
Accleration is a different story, its just...easier now, far more smooth and seems to reach 100 kph (60 mph) effortlessly.
Oh and the headers plan is dead. We talked about it today, not worth the money for such minimal gains on the Northstar.
Onto the TB...
Anyone wanna take a stab at what my crank HP is now? *see mod list*