to me, i might abit increase more power. because hot air is hard to compress rather than colder air is easier to compress. thus this might somehow increase abot power. maybe smaller CC engine might not feel significant improvement, but bigger CC might have some improvement. if ur engine produces alot of heat, it might affect the temperature inside engine bay. that's why racing car has louver on their front bonnet. to suck hot air out. but it cannot force air into ur air intake unless u channeled a intake from front or its a forced induction.