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04 6.0 Exchaust question

791 views 2 replies 2 participants last post by  Stan's 04 
#1 ·
Why do I get exhaust sound loud on start up and after a few seconds it sounds like something closes and it quiets down ? :doh:
 
#3 ·
Ok thanks for the reply wish it was that loud all the time , but it sounds bad a$$ when your on it .
 
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