When you buy exhaust are you paying for sound mostly or are you paying for more horsepower gains. what I am Trying to say is that the more expensive the more horsepower or the more expensive the better the sound. which is the best if I am going to buy an exhaust with 2.5'' piping.

 

bigger pipping= more fart
smaller pipping=less fart

If you want a good sounding exhaust I recomend a Greddy Evo2 or Apexi World sport. They dont give you the most power but they sound good. The exhaust with the best gain would have to be apexi N1 or any other 3 inch, but they are quite loud.

 

more HP gained the more noise ussually

 

so you pay for quality horsepower gains