Hi i just installed a new apr r1 dv about 4 days ago. Fits of all there abhuge difference when i put it on and love it. Now the bad part, after the third day i have it on it started making a pulsating hissing sound on idle. Louder specially in cold start and gradually tones down but doesnt go away. I attached a video clip that will let you hear the sound im talking about. Is this normal? And also it makes a loud last hiss when shut off the engine. Thanks in advance.


http://www.youtube.com/watch?v=1N4kM...e_gdata_player

 

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