The roof panel, which boosts fuel economy in the Prius by about 15 miles per gallon, also works on Toyota's popular Highlander Hybrid SUV. On the Highlander, it more than doubles fuel economy, according to SEV.
Installation takes a couple of hours for do-it-yourselfers, the company claims.
No word on its effect on your hybrid vehicle's factory warranty, however.
Source: The Robb Report