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Discussion Starter · #1 ·
So when u first start your truck is the vane supposed open up or close whatever it is and say that way or does it go back to regular exhaust. Today when I started my truck it sounded normal heard the vane kick in then it kicked back out is that normal?
 

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At idle ever now & then, the vanes make a sweep. Open & close. It does this to help prevent the vanes from sticking. The exhaust sound does change when this happens. Sound is more noticeable when youre straight piped.
 
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