Weird Hissing/Air Noise??
Don't know if this has ever been discussed before but i have a question. OK this is my setup:
-Stillen Gen 3 intakes
-FI non-resonated exhaust
-FI test pipes
I had the exhaust for about year, i then still wanted it louder. So after I installed the FI test pipes, there was an immediate hissing type of noise when u let off the gas, it sounds like pressure releasing or something of that nature. Is this normal or has anyone ever had this same thing? Also, could it be that I need to get the car tuned after having all that done? Any help would be awesome. Thanks!
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