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I think others have commented before that it's the HFCs that cause the hiss. It kinda makes sense, it's the air flowing through all those little passageways. You hear it
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07-12-2009, 12:19 PM
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A True Z Fanatic
 
Join Date: Mar 2009
Location: Houston, TX
Posts: 4,024
Drives: too slow
Rep Power: 3595   |
I think others have commented before that it's the HFCs that cause the hiss. It kinda makes sense, it's the air flowing through all those little passageways. You hear it on the decel side usually, probably because the pressure is backing off and the sound level of the rest of the exhaust is lower, allowing it to be heard better.
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