ok...so i got an s4 na...with RB headers to presilencer to stock mufflers...wondering what u guys think about certain exhaust. i was thinking dual apexi n1, but it might be hella louder, or RB obviously, or apexi gt spec...what do you think would compliment the straight pipes well?

 

RB should be the quietest of the bunch and have a nice tone to them. N1s and such will be pretty loud, but flow better. All depends on what you want.