Originally Posted by kill_kill_kill
to be fair, there are alot of known improvments not done by manufactures for various / unknown to me reasons. that's what this site is sorta all about, no?
Of course your point is obvioulsy still "right" ,,,i'm just sayin....
Well the average car is built for the average person.
If honda put a cai on every car, i'm sure a lot of people would complain about the added noise. Same goes for a free flowing exhaust. Sure it improves fuel economy and performance, but at a cost (added noise). Not all people are after every last bit of performance in their hyundai or civic.
Thats why "performance" cars tend to have a louder deeper exhaust tone (not only cause they usually have larger engines). since they are performance vehicles they can run that stuff.