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Discussion Starter · #1 ·
For my XB would putting a 2 12in sub box in the back lower the MPG? I figure since the box is kind of on the heavy side. :eek:hno:
 

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not unless the sub box was a few hundred pounds lol
 

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i have 2 15's and i haven't noticed a drop in gas, if there is any, it's not much.
 
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