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11-22-2009, 04:23 PM
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#21
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Drives: e92 JB M3, 2012 GTR
Join Date: Oct 2008
Location: GA
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Quote:
Originally Posted by MVF4Rrider
Does anyone make a rear diff ratio change for the E9X M3 yet? For sure the E46 M3s are geared too tall which helps emissions and fuel economy, but makes for less inspired grunt. Switching to a 3.91 rear diff from the 3.62 is the perfect choice without going overboard and trading grunt for traction. The rear diff swap is good for a half-second improvement in 0-62. And roll on acceleration and throttle response is improved dramatically. That's how important gearing is.
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Dinan makes them.
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