E46Fanatics - View Single Post - **3.91 Diff Swap: Everything you need to know!!!**
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Old 10-12-2008, 06:33 PM   #190
Registered User
Join Date: Nov 2007
Location: Leesburg VA
Posts: 580
My Ride: 325ci
How much did your gas millage dropped after the diff. install?? I use my 325ci as a commuter and I would love faster pick up but I dont wanna sacrifice my mpg too much....
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