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So you simple added a butterfly to the tip end of the stock headers??? Interesting.
 

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Discussion Starter #3
More or less. They slip over the stock exhaust headers.
You could adjust the angle of the baffle if desired.
 

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Discussion Starter #5
Yes. It is 1-5/8 diameter while the id of the pipe is 1-3/4. At first I had two in it but it sounded like blowing across a pop bottle.
 
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