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Old 07-28-2012, 08:57 PM
HEMI450HP HEMI450HP is offline
Join Date: Mar 2012
Location: Conroe, TX
Posts: 245
Gender: Male
Vehicle: 2010 Dodge Ram 2500
Color: Silver
Engine: 2007-2011 409ci (6.7L) Cummins Turbo Diesel 350hp 650lb/ft
Rep Power: 0
HEMI450HP will become famous soon enough

Running without a muffler is going to give more power and better mileage, so I would expect to lose mileage reguardless of which muffler you added.
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