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      04-13-2024, 07:19 AM   #3
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Drives: Built not Bought 04 Z4 VF. E70
Join Date: Feb 2013
Location: Kitchener Ontario Canada

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I have run the gambit, looking for my perfect ratio.
From 3.23 all the way to 4.44. yea that was just an experiment.

I decided the 3.91 was the right fit for me.

You are not limited to E85/86 diffs.
Most of the shorter ratios I sourced from E83 X3.
Also some E46 will fit.

Do your research.

https://web.archive.org/web/20200622...GearRatios.htm
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W2A Intercooled Vortech V3Si, custom ducting, Alpha N, 60# Bosch,2.62 pulley, multi port WMI, Severn Tuning(pokeybritches), Tial, magnaflow,SS race muffler, 42 design,3.91LSD, H&R, Hotchkis,ST coils,Konis, Megan camber arms, AKG SS, Nylon mounts, Poly bushings, Carbon interior, CF Aero.APEX
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