Originally Posted by DIGItonium

Haha... HFCs will definitely make the car sound a little louder, but I don't regret the benefits. Power feels like it kicks in 500rpm sooner, and it doesn't end there. Throttle response felt a bit sluggish at first after installing the exhaust and HFC. You'll even hear popping noises coming out of the exhaust, but it diminishes after a few weeks. At idle, the car sounds "lopey" as if it is off timing... but that's where the old school feeling comes back :-)