Originally Posted by taylor.zed

Thanks for the soundclip! Only problem with the FI RHFC is that they advertise it as their "quietest" option. Which in that case id just go back to stock cats. Im not so much wanting the power as I am wanting the sound quality. I did some research and it sounds like ARK R-Spec HFC have found a way to take down hiss dramatically. Although expensive this might be my best option to keep sound, flow and rid the hiss...