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Discussion Starter #1
I've decided to go with the MAC Catback with my prochamber but i want to do headers i got the PROCHAMBER that bolts to my stock headers, replacing the stock headers with shorty headers is it worth it if so im looking at JBA
 

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im not so sure about the 4.6s but i have been told that swapping from stock shorties to aftermarket shorties is a minimal increas.....should have went with longtubes man
 
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