I recently got my hands on some dealer training material for the 2017 updated Mitsubishi Mirage. They made numerous little changes to improve power and fuel efficiency. This one puzzles me a bit though and I'd like any help you can give that might explain it. They claim that adding this 'air guide' lowers intake temperatures (that makes senses) and that increases fuel economy. I have my doubts, but I'd like to hear any theories.
