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Discussion Starter #1
i have a '99 CC 3.9 and i am looking for a little more sound and possibly some more gas mileage. should i replace the stock muffler(that has a huge hole) with one of my extra trush glasspacks dump by axle and keep the cat; remove cat keep stock muffler; or something that i just dont know about and put a glasspack in place of cat and stock muffler. i have used the search and i cant find too much related to glasspacks and 3.9s that helps me. i do not have to pass emisions either. Thank you in advnce. BK
 
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