hmm,,well i have a 98 civic lx and i just got my greddy exhast system,,its loud when i put the real good gas in there BUT,,my bro has an rsx and he has a tanabe in there. his s**t sounds so f**king loud it is crazy and that is the only thing he has on his car . now there are different kinds so you have to get the racing kind,,(don't know which one for sure but check it out). i'm going to sell my exhast and get one like his. but it all depends if you want your car loud though. what exactly are you looking for? more power or the loudness?