This is the type of question that really cannot be answered. You see since exhaust alone does not produce huge amounts of HP, basically they are pretty much the same when it comes to performance. Now sound is different, we will all feel different on what we think sounds like what. Stuff like the size of the resonator, the size of the muffler, and the stuff it is made of will all help it to sound a certain way. So all in all it is really about what you likeOoi3igToO said:which exhaust is better...performance and sound...
Nick,Klutch RSX said:regular fireball is very very quiet... this will be my exhaust soon to come. im about to order this week. its a 2.362' pipeing. im not sure about HKS but i think its pretty loud. i want quiet as i am getting a race header. 2.25' right now with magnaflow is OK. but i want more top end power. and i feel as 2.5' pipeing is too big and loose too much low end. coupling this exhaust with a race header i think will make phenominal gains (this is what im switching out my system i have now for) and i should see 14.3-14.4 1/4 mi :spin: and with out a cat, i want it to be very quiet as to not attract law enforcement, i will also be painting the muffler black, so i dont draw any attention and will have the sleeper look