M-Series (M1, M3, M5, M6)General M-Series Discussion - If it does not fit into a more specific M Category above, please place it in here. In addition, previously archived M-Series discussion is located in this section.
is the auto M3 a 4speed or a 5speed? if its a 4speed then the gearing is probably to high which would cause quicker shifts and lower top speed. do you know what you have on your 325? if you want better acceleration then just go for a diff thats slightly higher than what you have now
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