Force India have added this unusual diffuser design. The upper deck of the double diffuser rises up to 400mm tall (yellow), the rear crash structure (green) now sits inside the diffuser, with the beam wing (blue) split to allow the diffuser to exit without obstruction.
VJM03 diffuser detail
Scarbsf1's Blog 
Crash structure INSIDE the diffuser! I kinda hope it’s a rocketship and gives some of the big boys a bloody nose!
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