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I did try looking but coudnt find where to buy the mouth piece or blocker plates for my 2004.5 gmc i just brought,

i got a hypertech on the way got it cheap, going to go with a 4in turbo back exhaust system, and somebodys intake. Leaning towards s-b.
 

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Discussion Starter #4
unless i missed something what about the mouth piece, sorry.
I been up for a whiel with the little one
 

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