Quote:
Originally Posted by Red370
I initially thought there might be a leak, but when I had it up on the dyno, I stood underneath the car to listen and see if i could hear/feel a leak, none to report. Kinda sounds like a brake pad rubbing a rotor doesnt it? I notice it more when I'm in a walled in area like a parking garage, or between buildings.
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Exactly. It has a metallic rubbing sound. In garages is when I notice it most as well, but if I listen closely I can hear it while driving on the street with the windows down.
Quote:
Originally Posted by fairladyZ34
if you dont put high flow cats or test pipes you wont get that hiss. its the only way to not have it. a resonated test pipe helps but the hiss is still there
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I have stock cats and a stillen CBE and I have the hiss for sure. I also heard the hiss when I had the stock CBE and muffler removed. It seems that anything that reduces backpressure magnifies the sound.