yes the other box has more volume...

as for the depth, you can make it angled... 11.5 at the near end behind the tail light and 13.5 at the far end

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BMW 1M 2012 - Current
Jeep Grand Cherokee Limited 2011 - Current
BMW E93 330i Convertible 2009 - Sold
BMW E46 320i 2004 - Sold
BMW X5 4.4i 2002 - Sold
VW Golf GTI 2000 - Sold
BMW 740i 1996 - Sold