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2009 CTS-V (Blue Diamond Manual/Recaros/Nav/Suede/Polished)
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299 Posts
Discussion Starter · #1 ·
When I hit the rev limiter in my manual V (which is very easy to do in 1st), I hear a weird sound..kind of a thud or clunk. Sounds like its coming from the exhaust? Anyone know what this might be? Some exhaust sound due to the sudden pressure drop?
 

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09 CTS-V a tuxedo with a jetpack!
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2,460 Posts
Your hearing "blower cough". All that pressure has to go somewhere when the throttle is lifted.

Easy to hear in this video I took at Summit Point
 
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