Best Roof Racks for a 2014 Toyota Prius Plug-In  

Helpful Expert Reply:

Most Toyota Prius owner's are conscious of or concerned with miles per gallon so to minimize the impact to mileage they gravitate towards the more aerodynamic roof racks. That is going to include aero bars. Any other style will have a larger negative impact on mileage.

With that in mind here are the parts needed for the most aerodynamic roof racks from the available manufacturers:

Yakima
JetStream bars # Y00426
BaseLine Towers # Y28TR
BaseClip # Y06117 (you would need 2 sets of these)

Inno
Aero crossbars # INXB100-108
Flush feet # INXS200
Fit kit # INK865

SeaSucker Monkey Bars # 298-SX6000B

Out of the above options the best option in my opinion is going to be the Inno roof rack or one of the Rhino-Rack roof racks because for those the bars are integrated into the feet making the racks more low profile and more aerodynamic. The Monkey Bars are likely the least aerodynamic.