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Discussion Starter #1
Can someone please tell me the diameter for the header pipes on a 04 Black bonnie.
thanks
 

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Since the aftermarket silencers fit several years up to 07 for sure, they would be 1.50" O.D. This I know since I've made a couple of mufflers for my 07.
 

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38mm or 1-1/2"
Most exhaust pipe in the US is found in inches so thats what I use.
 

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Discussion Starter #4
Thanks guys
 
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