Thread: Anyone look into changing the rear end ratio to improve gas mileage ??
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      06-15-2017, 01:40 PM   #1
wjibby
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Question Anyone look into changing the rear end ratio to improve gas mileage ??
Anyone out there ever thought about this ?? Is it even possible to purchase a different gear set that would improve gas mileage ?? I'm talking about a 3.0 si X5 model.
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wjibby
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