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As soon as you take out the cats, you'll get hiss. Do you have any resonators in the system?
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05-26-2016, 10:17 AM
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Base Member
Join Date: Oct 2015
Location: Northridge
Age: 32
Posts: 154
Drives: 14 370z SP 7AT
Rep Power: 10  |
Installed a aftermarket y-pipe with stock exhaust....
Quote:
I still have my resonators on! Also the hiss was only on deceleration before the new y-pipe now the hiss is way louder and hisses as soon as I let off the gas. The most noticeable difference is the cabin noise is very loud before it wasn't that loud until after 3.5k rpm. Exhaust leak maybe ? Sent from my iPhone using Tapatalk
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