It looks like one solid unit, seems you only have to block the area between the unit and the bodywork.
59 mpg is absolutely brilliant! I struggle to get that with my Insight, with its smaller engine, aerodynamical shape and hybrid system. I feel humbled. 
Even 50 mpg is very good for a 159.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
 lifetime FE over 0.2 Gigameter or 0.13 Megamile.
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For confirmation go to people just like you.
For education go to people unlike yourself.
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