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Discussion Starter #4
Soccerluvr4 said:
If its duals then yea it should help it out a little because you will have better airflow... Not so sure if it will do much with single exhaust.
Yeah I've got pypes mid-muffler catback
 

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You should open up the exhaust more before the tune high flow cats and h pipe
 

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Discussion Starter #8
Adogg said:
You should open up the exhaust more before the tune high flow cats and h pipe
I've got the most free flowing catback availible for the 4.0, short of being straight piped
 
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