I had aem cold air intake, dc header and trd axel back before, it makes very loud raspy sound, sounds like civics with exhaust, I hate it, so I went to a muffler shop and had them put in an extra resonator on the midpipe between the 2nd Cat and stock resonator, it reduces lot of the raspy sound, I like it alot, here's the video i took today to let you guys hear how it sounds like before doing the same setup.

http://www.youtube.com/watch?v=TfWqDK-Fpr4

 

how do you like the dc header? any problems with it so far? how's the low end power? has it improved or do you feel more of the low end torque loss?

 

its pretty good so far, easy to install and gain pretty good performance, it gives the car more power, the engine also sounds good.