I test drove a 323ci today.
One thing that I noticed was that the engine was quite hard to hear, even when hard on the gas.
I did nice hard acceleration off the line on a back road. It didn't "feel" really quick, but yet I hit 70mph a lot quicker that it "felt".
Does anyone who has replaced their stock exhaust w/ aftermarket feel that the car "feels" quicker w/ the aftermarket since you can hear the exaust more?